Cita APA (7th ed.)
Shaughnessy, J. J., & Zechmeister, E. B. (1990). Research methods in psychology (2nd ed.). McGraw-Hill, Inc..
Cita Chicago (17th ed.)
Shaughnessy, John J., i Eugene B. Zechmeister. Research Methods in Psychology. 2nd ed. New York: McGraw-Hill, Inc., 1990.
Cita MLA (9th ed.)
Shaughnessy, John J., i Eugene B. Zechmeister. Research Methods in Psychology. 2nd ed. McGraw-Hill, Inc., 1990.
Atenció: Aquestes cites poden no estar 100% correctes.