APA (7th ed.) Citation

Campbell, D., Draper, R., & Huffington, C. (1991). A systemic approach to consultation. Karnac Books.

Chicago Style (17th ed.) Citation

Campbell, David, Rosalind Draper, and Clare Huffington. A Systemic Approach to Consultation. London: Karnac Books, 1991.

MLA (9th ed.) Citation

Campbell, David, et al. A Systemic Approach to Consultation. Karnac Books, 1991.