Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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