APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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