APA aipamena

Mary Ellen Guffey. (2004). Essentials of: Business communications. Thomsom South-Western.

Chicago Style aipamena

Mary Ellen Guffey. Essentials Of: Business Communications. Thomsom South-Western, 2004.

MLA aipamena

Mary Ellen Guffey. Essentials Of: Business Communications. Thomsom South-Western, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.