Dyfyniad APA

Nichols, M. P., & Schwartz, R. C. (2001). The essentials of family therapy. Boston: Allyn & Bacon.

Dyfyniad Arddull Chicago

Nichols, Michael P., và Richard C. Schwartz. The Essentials of Family Therapy. Boston: Allyn & Bacon, 2001.

Dyfyniad MLA

Nichols, Michael P., và Richard C. Schwartz. The Essentials of Family Therapy. Boston: Allyn & Bacon, 2001.

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