APA (7th ed.) Zitazioa
Campbell, D., Draper, R., & Huffington, C. (1991). A systemic approach to consultation. Karnac Books.
Chicago Style (17th ed.) Zitazioa
Campbell, David, Rosalind Draper, eta Clare Huffington. A Systemic Approach to Consultation. London: Karnac Books, 1991.
MLA (9th ed.) Zitazioa
Campbell, David, et al. A Systemic Approach to Consultation. Karnac Books, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.