Blank, W. (1995). The 9 natural laws of leadership. AMACOM; VIVA Books Private Ltd..
Chicago (17e ed.) BronvermeldingBlank, Warren. The 9 Natural Laws of Leadership. New York; New Delhi: AMACOM; VIVA Books Private Ltd., 1995.
MLA (8e ed.) BronvermeldingBlank, Warren. The 9 Natural Laws of Leadership. AMACOM; VIVA Books Private Ltd., 1995.
Let op: Deze citaties zijn niet altijd 100% accuraat.