Dyfyniad APA

Kouzes, J. M., & Posner, B. Z. (2017). THE LEADERSHIP CHALLENGE WORKBOOK. San Francisco, CA : The Leadership Challenge.

Dyfyniad Arddull Chicago

Kouzes, James M., and Barry Z. Posner. THE LEADERSHIP CHALLENGE WORKBOOK. San Francisco, CA : The Leadership Challenge, 2017.

Dyfyniad MLA

Kouzes, James M., and Barry Z. Posner. THE LEADERSHIP CHALLENGE WORKBOOK. San Francisco, CA : The Leadership Challenge, 2017.

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