Dyfyniad APA
ebrary, Inc, Piercy, F. P., & Sprenkle, D. H. (2005). Research methods in family therapy (2nd ed.). Guilford Press.
Dyfyniad Arddull Chicago
ebrary, Inc, Fred P. Piercy, and Douglas H. Sprenkle. Research Methods in Family Therapy. 2nd ed. New York: Guilford Press, 2005.
Dyfyniad MLA
ebrary, Inc, et al. Research Methods in Family Therapy. 2nd ed. Guilford Press, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.