APA ציטוט

Verderber, R. F. (1982). The challenge of effective speaking (5th ed.). Wadsworth.

Chicago Style (17th ed.) Citation

Verderber, Rudolph F. The Challenge of Effective Speaking. 5th ed. Califonia: Wadsworth, 1982.

ציטוט MLA

Verderber, Rudolph F. The Challenge of Effective Speaking. 5th ed. Wadsworth, 1982.