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.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.