APA (American Psychological Association) style is commonly used in academic writing within the disciplines of science, psychology, nursing, and education. The manual does not just provide information on how to cite sources, but also includes a stylistic writing component. Consistency is important in academic writing. This research guide will attempt to address some of the common errors writers make when trying to write in APA style.
APA has just published the revised 7th edition of the Publication Manual of the American Psychological Association.
Publication manual of the American Psychological Association : the official guide to APA style by 
Concise Guide to APA Style by The first link below provides an example of an annotated student paper that is shown in the APA 7th Edition manaul. There is also an example of a Microsoft Word file format paper without the annotations.