Citazione Stile APA (7a Edizione)

Egan, G. (2007). The skilled helper: A problem-management and opportunity-development approach to helping (8th ed.). Thomson, Brooks/Cole.

Citazione stile Chigago Style (17a edizione)

Egan, Gerard. The Skilled Helper: A Problem-management and Opportunity-development Approach to Helping. 8th ed. Belmont, USA: Thomson, Brooks/Cole, 2007.

Citatione MLA (9a ed.)

Egan, Gerard. The Skilled Helper: A Problem-management and Opportunity-development Approach to Helping. 8th ed. Thomson, Brooks/Cole, 2007.