Παραπομπή APA

John c. Maxwell. (1999). The 21 Irrefutable laws of leadership. Magna Publishing co.Ltd.

Παραπομπή Chicago Style

John c. Maxwell. The 21 Irrefutable Laws of Leadership. Mumbai: Magna Publishing co.Ltd, 1999.

Παραπομπή MLA

John c. Maxwell. The 21 Irrefutable Laws of Leadership. Magna Publishing co.Ltd, 1999.