Cita APA

Covey, S. (1992). The seven habits of highly effective people. Simon & Schuster.

Citación estilo Chicago

Covey, Stephen. The Seven Habits of Highly Effective People. London: Simon & Schuster, 1992.

Cita MLA

Covey, Stephen. The Seven Habits of Highly Effective People. Simon & Schuster, 1992.

Warning: These citations may not always be 100% accurate.