Cita APA

Barker, C., Elliott, R., & Pistrang, N. (1994). Research methods in clinical and counselling psychology. J. Wiley.

Citación estilo Chicago

Barker, Chris, Robert Elliott, and Nancy Pistrang. Research Methods in Clinical and Counselling Psychology. Chichester: J. Wiley, 1994.

Cita MLA

Barker, Chris, et al. Research Methods in Clinical and Counselling Psychology. J. Wiley, 1994.