Dyfyniad APA

Boone, D. R., McFarlane, S. C., & Von Berg, S. L. (2005). The voice and voice therapy (7th ed.). Pearson.

Dyfyniad Arddull Chicago

Boone, Daniel R., Stephen C. McFarlane, and Shelley L. Von Berg. The Voice and Voice Therapy. 7th ed. Boston, MA: Pearson, 2005.

Dyfyniad MLA

Boone, Daniel R., et al. The Voice and Voice Therapy. 7th ed. Pearson, 2005.

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