APA aipamena

Kouzes, J. M., & Posner, B. Z. (2002). Leadership challenge. Jossey-Bass.

Chicago Style aipamena

Kouzes, James M., and Barry Z. Posner. Leadership Challenge. San Francisco: Jossey-Bass, 2002.

MLA aipamena

Kouzes, James M., and Barry Z. Posner. Leadership Challenge. Jossey-Bass, 2002.