Maxwell, J. C., & Stephen R. Covey. (2007). The 21 irrefutable laws of leadership: Follow them and people will follow you (10th ed.). Thomas Nelson.
Citace podle Chicago (17th ed.)Maxwell, John C., a Stephen R. Covey. The 21 Irrefutable Laws of Leadership: Follow Them and People Will Follow You. 10th ed. Tennessee, Mexico: Thomas Nelson, 2007.
Citace podle MLA (9th ed.)Maxwell, John C., a Stephen R. Covey. The 21 Irrefutable Laws of Leadership: Follow Them and People Will Follow You. 10th ed. Thomas Nelson, 2007.
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