As of July 2015, sample papers written in APA style are online at Purdue's Online Writing Lab, Western Oregon University, Gallaudet University and Indian River State College. Purdue's OWL example has text boxes that explain guidelines, writing style and citations.
WOU presents two samples of APA style in PDF format: short and formal research papers. The formal paper has additional sections, including an abstract and literature review.
Gallaudet's site contains a full eight-page term paper done in APA style. The Web page also has several links that offer assistance in the writing process. Indian River College's Academic Support Center has links to a term paper and APA format topics, such as reference pages and sources.