APA (7th ed.) Citation

Kouzes, J. M., & Posner, B. Z. (2007). The leadership challenge (4th ed.). John Wiley & Sons, Inc.

Chicago Style (17th ed.) Citation

Kouzes, James M., and Barry Z. Posner. The Leadership Challenge. 4th ed. San Francisco: John Wiley & Sons, Inc, 2007.

MLA (9th ed.) Citation

Kouzes, James M., and Barry Z. Posner. The Leadership Challenge. 4th ed. John Wiley & Sons, Inc, 2007.