Παραπομπή σε μορφή APA (7η εκδ.)

Maxwell, J. C. (1999). The 21 indispensable qualities of a leader: Becoming the person others will want to follow. T. Nelson.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Maxwell, John C. The 21 Indispensable Qualities of a Leader: Becoming the Person Others Will Want to Follow. Nashville, TN: T. Nelson, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Maxwell, John C. The 21 Indispensable Qualities of a Leader: Becoming the Person Others Will Want to Follow. T. Nelson, 1999.