How do I do an in-text citation if there is no author?

APA STYLE:

Unknown Author: If the work does not have an author, cite the source by its title in the signal phrase or use the first word or two in the parentheses. Titles of books and reports are italicized or underlined; titles of articles, chapters, and web pages are in quotation marks.

MLA STYLE:

When a source has no known author, use a shortened title of the work instead of an author name. Place the title in quotation marks if it's a short work (e.g. articles) or italicize it if it's a longer work (e.g. plays, books, television shows, entire websites) and provide a page number.

We see so many global warming hotspots in North America likely because this region has “more readily accessible climatic data and more comprehensive programs to monitor and study environmental change . . . ” (“Impact of Global Warming” 6).

http://answers.yahoo.com/question/index;_ylt=Alweh... Mine please??

You would use the webstie. Ex - "The car was crashed by blah blah" (CBS News).