Dyfyniad APA

Jacobs, E. E., Harvill, R. L., & Masson, R. L. (1994). Group counseling: Strategies and skills (2nd ed.). Brooks/Cole Pub.

Dyfyniad Arddull Chicago

Jacobs, Edward E., Riley L. Harvill, and Robert L. Masson. Group Counseling: Strategies and Skills. 2nd ed. Pacific Grove, Calif: Brooks/Cole Pub, 1994.

Dyfyniad MLA

Jacobs, Edward E., et al. Group Counseling: Strategies and Skills. 2nd ed. Brooks/Cole Pub, 1994.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.