APA Citatie

Covey, S. R. (1991). Principle centered leadership. New York: A Fireside.

Chicago Style citaat

Covey, Stephen R. Principle Centered Leadership. New York: A Fireside, 1991.

MLA citatie

Covey, Stephen R. Principle Centered Leadership. New York: A Fireside, 1991.

Let op: Deze citaties zijn niet altijd 100% accuraat.