Egan, G. (2007). Exercises in helping skills: A manual to accompany - the skilled helper (8th ed.). Australia: Thomson Brooks/Cole.
Chicago-tyylinen lähdeviittausEgan, Gerard. Exercises in Helping Skills: A Manual to Accompany - the Skilled Helper. 8th ed. Australia: Thomson Brooks/Cole, 2007.
MLA-viiteEgan, Gerard. Exercises in Helping Skills: A Manual to Accompany - the Skilled Helper. 8th ed. Australia: Thomson Brooks/Cole, 2007.
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