COVEY, S. R. (1997). The seven habits of highly effective people. Jakarta: Binarupa Aksara.
Chicago Style CitationCOVEY, Stephen R. The Seven Habits of Highly Effective People. Jakarta: Binarupa Aksara, 1997.
Cita MLACOVEY, Stephen R. The Seven Habits of Highly Effective People. Jakarta: Binarupa Aksara, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.