Egan, G. (2007). The skilled helper: A problem-management and opportunity-development approach to helping (8th ed.). Thomson, Brooks/Cole.
Lua i Stíl Chicago (17ú heag.)Egan, Gerard. The Skilled Helper: A Problem-management and Opportunity-development Approach to Helping. 8th ed. Belmont, USA: Thomson, Brooks/Cole, 2007.
Lua MLA (9ú heag.)Egan, Gerard. The Skilled Helper: A Problem-management and Opportunity-development Approach to Helping. 8th ed. Thomson, Brooks/Cole, 2007.
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