For sources with more than 1 author, include the first listed author’s name (first name first, last name second) and a comma. Next, add the second and third authors’ names and the italicized book title. (Don’t italicize article titles; these appear in quotation marks.) Finally, type out the publication location, publisher, and date of publication in parentheses.  For example: “Robert J. Cottrol, Raymond T. Diamond, and Leland B. Ware, Brown v. Board of Education: Caste, Culture, and the Constitution (Lawrence: University Press of Kansas, 2003).” If you’re citing particular page numbers, these will go at the end of the citation. Add a comma after the parentheses, type out the page numbers, and then close the citation with a period. For Chicago style, you’ll use footnotes instead of in-text citations. These are full bibliographic citations that appear at the bottom of the page where you’ve referenced a text. Type out only the first author that’s listed on the title page. After that, add a comma and “et al.” In the bibliography, you’ll still write out all of the authors’ names. Since footnotes are full bibliographic citations, all the information you need is already there! Just invert the first and last name of the first listed author. Next, add a comma and type out the next author’s name, first name first, last name second. Separate different elements of the bibliographic entry with periods. Finally, eliminate the parentheses surrounding the publication information. For example: “Cottrol, Robert J., Raymond T. Diamond, and Leland B. Ware. Brown v. Board of Education: Caste, Culture, and the Constitution. Lawrence: University Press of Kansas, 2003.” You’ll still type out the first 7 authors’ names listed on the title page. After that, replace any subsequent authors listed with “et al.”
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One-sentence summary -- Separate 2-3 authors with commas and “and” before the last author. Replace authors’ names with “et al” in the footnote if there are 4-10. Make small changes to your footnotes for the bibliography. Replace more than 10 authors’ names with “et al” in the bibliography.

Q: It’s not common knowledge, but sunburn on the top of your head can have a negative effect on the volume of your hair. A sunburned scalp will cause hair to fall out, leading to thinner hair with reduced volume. So, if you’re going to be out in the sun for more than 20 or 30 minutes, plan to wear a hat or put some sunscreen on the top of your head. Burning the top of your head will also make the hairs themselves brittle and thin, which decreases the amount of volume in your hair. Many men wear a baseball cap, stocking cap, or cowboy hat on a day-to-day basis. Unfortunately, this can have a negative effect on the volume of your hair. Wearing a hat can compress your hair and reduce its volume, and can also reduce circulation to your scalp. This, in turn, will reduce the health and volume of your hair. Wearing a tight hat every day can also damage your follicles and cause your hair to thin. If part of the reason your hair has lost volume is that your hair is thinning, a hair-growth product may be the most effective way to restore hair volume. Talk to your doctor, and see what type of hair-growth product they recommend. It is important to note that these products both have better success rates at stopping hair loss than they do with re-growing lost hair, so be proactive and consult your doctor as soon as you notice your hair starting to thin. The two most popular hair growth products on the market contain minoxidil (found in products such as Rogaine) and finasteride (found in products like Propecia). Minoxidil is a topical treatment and finasteride comes in pill form.
A: Avoid sunburn on your scalp. Don’t wear a tight hat every day. Consider using hair-growth products.

Article: Find and tap the {"smallUrl":"https:\/\/www.wikihow.com\/images\/1\/1e\/Androidgoogleplay.png","bigUrl":"\/images\/thumb\/1\/1e\/Androidgoogleplay.png\/26px-Androidgoogleplay.png","smallWidth":460,"smallHeight":531,"bigWidth":"26","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of an Android icon\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"} icon on your Apps menu to open the Play Store. The search bar reads Google Play at the top of your screen. You can enter any keyword here to search the apps, books, or movies on the Play Store. The search function is not case-sensitive. You don't have to capitalize any letters here. This will search the store, and list all the matching results on a new page. If you're using Google Keyboard, tap the green magnifier icon on the bottom-left. The GroupMe icon looks like a blue speech bubble with a white "#" icon in it. Tapping it will open the app info page. This button is located below the GroupMe icon on the app info page. It will download and install the app on your Android. If you see a button that says OPEN instead of INSTALL, this means you already have the app installed on your Android. You will see a green progress bar on the app info page that shows your download rate. When your download hits 100%, the progress bar will disappear. When your download is finished, your Android will have to install the downloaded app. The app page will indicate "Installing". When the app is installed and ready to go, you will see a white UNINSTALL button and a green OPEN button on the app page. Tapping this button will open the app.
Question: What is a summary of what this article is about?
Open the Play Store on your Android. Tap the search bar. Type GroupMe into the search bar. Tap ↵ Enter or ⏎ Return on your keyboard. Find and tap the GroupMe app in the search results. Tap the green INSTALL button. Wait for your download to finish. Wait for the app installation to finish after the download. Tap the green OPEN button.