APA-referens (7:e uppl.)

Penrose, J. M. (2004). Business Communication for Managers (5th.). Cengage Learning.

Chicago-referens (17:e uppl.)

Penrose, John M. Business Communication for Managers. 5th. New Delhi: Cengage Learning, 2004.

MLA-referens (9:e uppl.)

Penrose, John M. Business Communication for Managers. 5th. Cengage Learning, 2004.