Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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