Harris, R. A. (2014). Using sources effectively: Strengthening your writing and avoiding plagiarism (4th ed.). Pyrczak Pub.
Cita Chicago (17th ed.)Harris, Robert A. Using Sources Effectively: Strengthening Your Writing and Avoiding Plagiarism. 4th ed. Glendale, CA: Pyrczak Pub, 2014.
Cita MLA (9th ed.)Harris, Robert A. Using Sources Effectively: Strengthening Your Writing and Avoiding Plagiarism. 4th ed. Pyrczak Pub, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.