APA (7e ed.) Bronvermelding

Covey, S. (1992). The seven habits of highly effective people. Simon & Schuster.

Chicago (17e ed.) Bronvermelding

Covey, Stephen. The Seven Habits of Highly Effective People. London: Simon & Schuster, 1992.

MLA (9e ed.) Bronvermelding

Covey, Stephen. The Seven Habits of Highly Effective People. Simon & Schuster, 1992.

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