Maxwell, J. C. (1999). The 21 indispensable qualities of a leader: Becoming the person others will want to follow. T. Nelson.
Lua i Stíl Chicago (17ú heag.)Maxwell, John C. The 21 Indispensable Qualities of a Leader: Becoming the Person Others Will Want to Follow. Nashville, TN: T. Nelson, 1999.
Lua MLA (9ú heag.)Maxwell, John C. The 21 Indispensable Qualities of a Leader: Becoming the Person Others Will Want to Follow. T. Nelson, 1999.
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