Cita APA (7th ed.)
Corey, G. (1991). Group techniques (2nd ed.). Brooks/Cole.
Cita Chicago (17th ed.)
Corey, Gerald. Group Techniques. 2nd ed. California: Brooks/Cole, 1991.
Cita MLA (9th ed.)
Corey, Gerald. Group Techniques. 2nd ed. Brooks/Cole, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.