APA-referens (7:e uppl.)

Howell, J. P., & Costley, D. L. (2006). Understanding Behaviors for Effective Leadership (2nd ed.). Prentice-Hall of India Private Limited.

Chicago-referens (17:e uppl.)

Howell, Jon P., och Dan L. Costley. Understanding Behaviors for Effective Leadership. 2nd ed. New Delhi: Prentice-Hall of India Private Limited, 2006.

MLA-referens (9:e uppl.)

Howell, Jon P., och Dan L. Costley. Understanding Behaviors for Effective Leadership. 2nd ed. Prentice-Hall of India Private Limited, 2006.