Campbell, D. (2002). Leadership in Action: In Focus - Leadership Characteristics - Nine Keys to Good Leadership. Center for Creative Leadership.
Chicago-Zitierstil (17. Ausg.)Campbell, David. Leadership in Action: In Focus - Leadership Characteristics - Nine Keys to Good Leadership. [Place of publication not identified]: Center for Creative Leadership, 2002.
MLA-Zitierstil (9. Ausg.)Campbell, David. Leadership in Action: In Focus - Leadership Characteristics - Nine Keys to Good Leadership. Center for Creative Leadership, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.