APA (7e ed.) Bronvermelding

Howell, J. P., & Costley, D. L. (2006). Understanding behaviors for effective leadership (Second edition.). Pearson Prentice Hall.

Chicago (17e ed.) Bronvermelding

Howell, Jon P., en Dan L. Costley. Understanding Behaviors for Effective Leadership. Second edition. Upper Saddle River, NJ: Pearson Prentice Hall, 2006.

MLA (9e ed.) Bronvermelding

Howell, Jon P., en Dan L. Costley. Understanding Behaviors for Effective Leadership. Second edition. Pearson Prentice Hall, 2006.