APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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