توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Maxwell, J. C., & Stephen R. Covey. (2007). The 21 irrefutable laws of leadership: Follow them and people will follow you (10th ed.). Thomas Nelson.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Maxwell, John C., و Stephen R. Covey. The 21 Irrefutable Laws of Leadership: Follow Them and People Will Follow You. 10th ed. Tennessee, Mexico: Thomas Nelson, 2007.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Maxwell, John C., و Stephen R. Covey. The 21 Irrefutable Laws of Leadership: Follow Them and People Will Follow You. 10th ed. Thomas Nelson, 2007.