APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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