Double-check that you've correctly cited all of your sources after you write. (Use your style guide!)
The good news is that Microsoft Word makes it easy to check your text and citations as you write! Learn how to use Word's similarity checker and citation tools.
Please note: The official plagiarism detection tool used by the University is Turnitin (read more below). The University and the Library do not endorse the free checkers linked above and cannot guarantee that their results will be accepted by your professor.
APUS subscribes to Turnitin, which is integrated into the classroom Assignments tool. The library does not have access to this feature in the classroom, so please contact your instructor with questions. Click here to learn more about Turnitin at APUS.