APA (7th ed.) Zitazioa

Egan, G. (1975). The skilled helper: A model for systematic helping and interpersonal relating. Brooks / Cole.

Chicago Style (17th ed.) Zitazioa

Egan, Gerard. The Skilled Helper: A Model for Systematic Helping and Interpersonal Relating. California: Brooks / Cole, 1975.

MLA (9th ed.) Zitazioa

Egan, Gerard. The Skilled Helper: A Model for Systematic Helping and Interpersonal Relating. Brooks / Cole, 1975.