APA ציטוט

Verderber, R. (2008). The challenge of effective speaking (Fourteenth edition.). Belmont, CA: Cengage Learning.

Chicago Style Citation

Verderber, Rudolph. The Challenge of Effective Speaking. Fourteenth edition. Belmont, CA: Cengage Learning, 2008.

ציטוט MLA

Verderber, Rudolph. The Challenge of Effective Speaking. Fourteenth edition. Belmont, CA: Cengage Learning, 2008.