APA (7th ed.) Zitazioa
Egan, G., & Cowan, M. (1979). People in systems: A model for development in the human-service professions and education. Brooks/Cole.
Chicago Style (17th ed.) Zitazioa
Egan, Gerald, eta Michael Cowan. People in Systems: A Model for Development in the Human-service Professions and Education. Monterey, Calif: Brooks/Cole, 1979.
MLA (9th ed.) Zitazioa
Egan, Gerald, eta Michael Cowan. People in Systems: A Model for Development in the Human-service Professions and Education. Brooks/Cole, 1979.
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