Cita APA (7th ed.)
Egan, G., & Cowan, M. (1979). People in systems: A model for development in the human-service professions and education. Brooks/Cole.
Cita Chicago (17th ed.)
Egan, Gerald, i Michael Cowan. People in Systems: A Model for Development in the Human-service Professions and Education. Monterey, Calif: Brooks/Cole, 1979.
Cita MLA (9th ed.)
Egan, Gerald, i Michael Cowan. People in Systems: A Model for Development in the Human-service Professions and Education. Brooks/Cole, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.