Egan, G. (1990). Exercises in helping skills: A training manual to accompany the skilled helper (4th ed.). Brooks/Cole.
Citação do estilo Chicago (17ª ed.)Egan, Gerard. Exercises in Helping Skills: A Training Manual to Accompany the Skilled Helper. 4th ed. Monterey: Brooks/Cole, 1990.
Citação MLA (9ª ed.)Egan, Gerard. Exercises in Helping Skills: A Training Manual to Accompany the Skilled Helper. 4th ed. Brooks/Cole, 1990.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.