PORTNOY ROBERT A. (1986). LEADERSHIP: WHAT EVERY LEADER SHOULD KNOW ABOUT PEOPLE. PRENTICE -HALL INTERNATIONAL, INC.
Chicago-Zitierstil (17. Ausg.)PORTNOY ROBERT A. LEADERSHIP: WHAT EVERY LEADER SHOULD KNOW ABOUT PEOPLE. NEW JERSEY: PRENTICE -HALL INTERNATIONAL, INC, 1986.
MLA-Zitierstil (9. Ausg.)PORTNOY ROBERT A. LEADERSHIP: WHAT EVERY LEADER SHOULD KNOW ABOUT PEOPLE. PRENTICE -HALL INTERNATIONAL, INC, 1986.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.