Cita APA

Covey,Stephen R. (2004). Eightth habit from effectiveness to greatness. Simon & Schuster.

Chicago Edition Citation

Covey,Stephen R. Eightth Habit from Effectiveness to Greatness. New York: Simon & Schuster, 2004.

Cita MLA

Covey,Stephen R. Eightth Habit from Effectiveness to Greatness. Simon & Schuster, 2004.

Atenció: Aquestes cites poden no estar 100% correctes.