These "Best Bets" are large academic databases and include citations on most topics. Skip to the boxes below for more subject-specific options, such as History, Humanities, Newspapers, Social Sciences, etc.
Most databases have a box to check if you want only "Academic" or "Peer-Reviewed" articles. Sometimes you have to decide whether an article fits your Professor's requirements for academic articles. The resources below can help you decide.
Although this page from Purdue's OWL is entitled "Writing Report Abstracts," it works just as well for papers:
WSU's College of Liberal Arts and Sciences also has an excellent page on writing Abstracts for students who submit their work to be showcased at the annual Rushton Undergraduate Conference: