Cita APA (7th ed.)

Shaughnessy, J. J., & Zechmeister, E. B. (1997). Research methods in psychology (4th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Shaughnessy, John J., i Eugene B. Zechmeister. Research Methods in Psychology. 4th ed. New York: McGraw-Hill, 1997.

Cita MLA (8th ed.)

Shaughnessy, John J., i Eugene B. Zechmeister. Research Methods in Psychology. 4th ed. McGraw-Hill, 1997.