Cita APA (7th ed.)

Corey, M. S., Corey, G., & Corey, C. (2014). Groups: Process and practice (9th ed.). Brooks/Cole/Cengage Learning.

Cita Chicago (17th ed.)

Corey, Marianne Schneider, Gerald Corey, i Cindy Corey. Groups: Process and Practice. 9th ed. Belmont, Calif: Brooks/Cole/Cengage Learning, 2014.

Cita MLA (9th ed.)

Corey, Marianne Schneider, et al. Groups: Process and Practice. 9th ed. Brooks/Cole/Cengage Learning, 2014.