Cita APA (7th ed.)

Covey, S. R. (2013). The 7 Habits of Highly Effective People. Simon & Schuster.

Cita Chicago (17th ed.)

Covey, Stephen R. The 7 Habits of Highly Effective People. UK: Simon & Schuster, 2013.

Cita MLA (9th ed.)

Covey, Stephen R. The 7 Habits of Highly Effective People. Simon & Schuster, 2013.