Cita APA

Lefton, L. A., & Valvatne, L. (1983). Mastering psychology. :.

Chicago Style Citation

Lefton, Lester A., i Laura Valvatne. Mastering Psychology. :, 1983.

Cita MLA

Lefton, Lester A., i Laura Valvatne. Mastering Psychology. :, 1983.

Atenció: Aquestes cites poden no estar 100% correctes.