Egan, G. (1975). Exercises in helping skills: A training manual to accompany the skilled helper. Brooks/Cole.
Citace podle Chicago (17th ed.)Egan, Gerard. Exercises in Helping Skills: A Training Manual to Accompany the Skilled Helper. Monterey: Brooks/Cole, 1975.
Citace podle MLA (9th ed.)Egan, Gerard. Exercises in Helping Skills: A Training Manual to Accompany the Skilled Helper. Brooks/Cole, 1975.
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