Cita APA (7a ed.)

Shaughnessy, J. J., & Zechmeister, E. B. (1990). Research methods in psychology (2nd ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Shaughnessy, John J., y Eugene B. Zechmeister. Research Methods in Psychology. 2nd ed. New York [etc.]: McGraw-Hill, 1990.

Cita MLA (9a ed.)

Shaughnessy, John J., y Eugene B. Zechmeister. Research Methods in Psychology. 2nd ed. McGraw-Hill, 1990.