Cita APA (7a ed.)

Covey Stephen R. (2004). Seven habits Of Highly Effective People. Simon Schuster.

Cita Chicago Style (17a ed.)

Covey Stephen R. Seven Habits Of Highly Effective People. London: Simon Schuster, 2004.

Cita MLA (9a ed.)

Covey Stephen R. Seven Habits Of Highly Effective People. Simon Schuster, 2004.