Perrin, R. (2005). Handbook for college research (3rd ed.). Houghton Mifflin Company.
Cita Chicago (17th ed.)Perrin, Robert. Handbook for College Research. 3rd ed. Boston, New York: Houghton Mifflin Company, 2005.
Cita MLA (9th ed.)Perrin, Robert. Handbook for College Research. 3rd ed. Houghton Mifflin Company, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.