APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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