Cita APA

Shaughnessy, J. J., Zechmeister, E. B., & Zechmeister, J. S. (2009). Research methods in psychology (9th ed.). McGraw-Hill Education.

Citación estilo Chicago

Shaughnessy, John J., Eugene B. Zechmeister, and Jeanne S. Zechmeister. Research Methods in Psychology. 9th ed. New York, NY: McGraw-Hill Education, 2009.

Cita MLA

Shaughnessy, John J., et al. Research Methods in Psychology. 9th ed. McGraw-Hill Education, 2009.