Cita APA (7a ed.)

Covey, S. R. (1999). The 7 habits of highly effective people: Restoring the character ethic. Simon & Schuster.

Cita Chicago Style (17a ed.)

Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. London: Simon & Schuster, 1999.

Cita MLA (9a ed.)

Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Simon & Schuster, 1999.