APA (7th ed.) Citation

Covey, S. R. (2004). The 7 habits of highly effective people. Free Press.

Chicago Style (17th ed.) Citation

Covey, Stephen R. The 7 Habits of Highly Effective People. New York: Free Press, 2004.

MLA (8th ed.) Citation

Covey, Stephen R. The 7 Habits of Highly Effective People. Free Press, 2004.