Dyfyniad APA

Verderber, K. S., Sellnow, D. D., & Verderber, R. F. (2015). Speak2 (Student Edition.). Cengage Learning.

Dyfyniad Arddull Chicago

Verderber, Kathleen S., Deanna D. Sellnow, and Rudolph F. Verderber. Speak2. Student Edition. Boston, MA: Cengage Learning, 2015.

Dyfyniad MLA

Verderber, Kathleen S., et al. Speak2. Student Edition. Cengage Learning, 2015.

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