Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Campbell, David, Rosalind Draper, y Clare Huffington. A Systemic Approach to Consultation. London ; New York: Karnac Books, 1991.

Cita MLA (8a ed.)

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