Dyfyniad APA

Kouzes, J. M., & Posner, B. Z. (2010). The leadership challenge (3rd.). Wiley India (P) Ltd.

Dyfyniad Arddull Chicago

Kouzes, James M., and Barry Z. Posner. The Leadership Challenge. 3rd. New Delhi: Wiley India (P) Ltd, 2010.

Dyfyniad MLA

Kouzes, James M., and Barry Z. Posner. The Leadership Challenge. 3rd. Wiley India (P) Ltd, 2010.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.