Article: Go to https://www.wikipedia.org in your computer's web browser. Type the topic for which you want to cite an article into the text box at the bottom of the page and press ↵ Enter, then select the article you want to cite. You'll find this heading on the far-left side of the article's page, well-below the Wikipedia logo. It's near the bottom of the "Tools" section. Doing so brings you to a list of different citation types for the selected article. This section is near the top of the page. You should see a citation in the following format below the "MLA Style Manual" heading:  Wikipedia contributors. "Article Title." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, date last edited. Web. Date retrieved. For example, the citation for "Plagiarism" would be as follows: Wikipedia contributors. "Plagiarism." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, 15 May 2018. Web. 16 May 2018. Click and drag your mouse cursor across the citation, then press either Ctrl+C (Windows) or ⌘ Command+C (Mac) to copy it. You can then paste it into your Works Cited page by pressing Ctrl+V (Windows) or ⌘ Command+V (Mac).  The citation begins with "Wikipedia contributors" listed as the "author". You can keep this section or delete it before adding the citation to your Works Cited page—both options are okay per MLA's rules. You'll notice that the citation here doesn't include the Wikipedia article's address. While including a URL is helpful, MLA style doesn't require the URL, so Wikipedia's official citations don't either.

What is a summary?
Open Wikipedia. Find your article. Find the "Tools" section. Click Cite this page. Scroll down to the "MLA Style Manual" section. Copy the citation.