As a university student, you already know you shouldn't plagiarize and that doing so carries stiff penalties. Check the links below to learn about unintentional plagiarism, when and how to cite, and avoiding the temptation altogether. Please visit, phone, or email the Center for Business Communications with any further questions.
Resources on Plagiarism
The Duke University Library has a number of useful and interesting pages, including a handy tutorial.
Yale University's Writing Center provides practical suggestions on "How to Copy and Paste but Avoid Plagiarism".
Learn more about how American University approaches plagiarism sanctions and penalties at this site on AU's academic integrity code.