Cita APA (7a ed.)

Howitt, D., & Cramer, D. (2020). Research methods in psychology (Sixth edition.). Pearson.

Cita Chicago Style (17a ed.)

Howitt, Dennis, y Duncan Cramer. Research Methods in Psychology. Sixth edition. Harlow, England: Pearson, 2020.

Cita MLA (9a ed.)

Howitt, Dennis, y Duncan Cramer. Research Methods in Psychology. Sixth edition. Pearson, 2020.