Cita APA (7th ed.)

Corey, G., & Corey, M. S. (1992). Group techniques (2nd ed.). Brooks / Cole.

Cita Chicago (17th ed.)

Corey, Gerald, i Marianne S. Corey. Group Techniques. 2nd ed. California: Brooks / Cole, 1992.

Cita MLA (9th ed.)

Corey, Gerald, i Marianne S. Corey. Group Techniques. 2nd ed. Brooks / Cole, 1992.