APA استشهاد

Lehman, C. M. . .., & Dufrene,Debbie D. (2004). Business communication (12th ed.). Thomson Learning.

استشهاد بنمط شيكاغو

Lehman, Carol M ., و Dufrene,Debbie D. Business Communication. 12th ed. Canada: Thomson Learning, 2004.

MLA استشهاد

Lehman, Carol M ., و Dufrene,Debbie D. Business Communication. 12th ed. Thomson Learning, 2004.