Cita APA

Covey, S. R. (2006). 8th habit: From effectiveness to greatness. Simon $ Schuster.

Chicago Edition Citation

Covey, Stephen R. 8th Habit: From Effectiveness to Greatness. London: Simon $ Schuster, 2006.

Cita MLA

Covey, Stephen R. 8th Habit: From Effectiveness to Greatness. Simon $ Schuster, 2006.