Harris, R. A. (2014). Using sources effectively: Strengthening your writing and avoiding plagiarism (4th ed.). Pyrczak Pub.
Chicago-viite (17. p.)Harris, Robert A. Using Sources Effectively: Strengthening Your Writing and Avoiding Plagiarism. 4th ed. Glendale, CA: Pyrczak Pub, 2014.
MLA-viite (9. p.)Harris, Robert A. Using Sources Effectively: Strengthening Your Writing and Avoiding Plagiarism. 4th ed. Pyrczak Pub, 2014.
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