Citazione Stile APA (7a Edizione)

Egan, G. (2010). The skilled helper: A problem-management and opportunity-development approach to helping (9th ed.). Brooks/Cole.

Citazione stile Chigago Style (17a edizione)

Egan, Gerard. The Skilled Helper: A Problem-management and Opportunity-development Approach to Helping. 9th ed. Australia: Brooks/Cole, 2010.

Citatione MLA (9a ed.)

Egan, Gerard. The Skilled Helper: A Problem-management and Opportunity-development Approach to Helping. 9th ed. Brooks/Cole, 2010.