Cita APA

Covey, S. (1999). The 7 habits of highly effective people. Pocket Books.

Citación estilo Chicago

Covey, Stephen. The 7 Habits of Highly Effective People. U.K: Pocket Books, 1999.

Cita MLA

Covey, Stephen. The 7 Habits of Highly Effective People. Pocket Books, 1999.

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