Egan, G. (1986). The Skilled helper: A systematic approach to effective helping (3ª ed.). Brooks.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEgan, Gerard. The Skilled Helper: A Systematic Approach to Effective Helping. 3ª ed. Brooks, 1986.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEgan, Gerard. The Skilled Helper: A Systematic Approach to Effective Helping. 3ª ed. Brooks, 1986.
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