APA (7e ed.) Bronvermelding

Covey Stephen R. (2004). 7 Habits of highly effective people. Pocket Books.

Chicago (17e ed.) Bronvermelding

Covey Stephen R. 7 Habits of Highly Effective People. London: Pocket Books, 2004.

MLA (9e ed.) Bronvermelding

Covey Stephen R. 7 Habits of Highly Effective People. Pocket Books, 2004.

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