Style de citation APA (7e éd.)

Covey, S. R. (2004). The 8th habit: From effectiveness to greatness. Free Press.

Style de citation Chicago (17e éd.)

Covey, Stephen R. The 8th Habit: From Effectiveness to Greatness. New York: Free Press, 2004.

Style de citation MLA (8e éd.)

Covey, Stephen R. The 8th Habit: From Effectiveness to Greatness. Free Press, 2004.