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