APA (7e ed.) Bronvermelding

Guffey, M. E. (1995). Essentials of business communication (3rd ed.). South-Western College.

Chicago (17e ed.) Bronvermelding

Guffey, Mary Ellen. Essentials of Business Communication. 3rd ed. Cincinnati, Ohio: South-Western College, 1995.

MLA (9e ed.) Bronvermelding

Guffey, Mary Ellen. Essentials of Business Communication. 3rd ed. South-Western College, 1995.