APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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