Blank, W. (1995). The 9 natural laws of leadership. AMACOM; VIVA Books Private Ltd..
Citazione stile Chigago Style (17a edizione)Blank, Warren. The 9 Natural Laws of Leadership. New York; New Delhi: AMACOM; VIVA Books Private Ltd., 1995.
Citatione MLA (8a ed.)Blank, Warren. The 9 Natural Laws of Leadership. AMACOM; VIVA Books Private Ltd., 1995.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.