PORTNOY ROBERT A. (1986). LEADERSHIP: WHAT EVERY LEADER SHOULD KNOW ABOUT PEOPLE. PRENTICE -HALL INTERNATIONAL, INC.
Citazione stile Chigago Style (17a edizione)PORTNOY ROBERT A. LEADERSHIP: WHAT EVERY LEADER SHOULD KNOW ABOUT PEOPLE. NEW JERSEY: PRENTICE -HALL INTERNATIONAL, INC, 1986.
Citatione MLA (9a ed.)PORTNOY ROBERT A. LEADERSHIP: WHAT EVERY LEADER SHOULD KNOW ABOUT PEOPLE. PRENTICE -HALL INTERNATIONAL, INC, 1986.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.