HUGHES RICHARD L. (2014). LEADERSHIP (7TH ED.). MCGRAW HILL EDUCATION.
Chicago (17e ed.) BronvermeldingHUGHES RICHARD L. LEADERSHIP. 7TH ED. NEW DELHI: MCGRAW HILL EDUCATION, 2014.
MLA (9e ed.) BronvermeldingHUGHES RICHARD L. LEADERSHIP. 7TH ED. MCGRAW HILL EDUCATION, 2014.
Let op: Deze citaties zijn niet altijd 100% accuraat.