APA (7e ed.) Bronvermelding
Egan, G., & Cowan, M. (1979). People in systems: A model for development in the human-service professions and education. Brooks/Cole.
Chicago (17e ed.) Bronvermelding
Egan, Gerald, en Michael Cowan. People in Systems: A Model for Development in the Human-service Professions and Education. Monterey, Calif: Brooks/Cole, 1979.
MLA (9e ed.) Bronvermelding
Egan, Gerald, en Michael Cowan. People in Systems: A Model for Development in the Human-service Professions and Education. Brooks/Cole, 1979.
Let op: Deze citaties zijn niet altijd 100% accuraat.