Covey, S. (2004). The 7 habits of highly effective teens personal workbook. Simon & Schuster.
Cita Chicago Style (17a ed.)Covey, Sean. The 7 Habits of Highly Effective Teens Personal Workbook. New York: Simon & Schuster, 2004.
Cita MLA (9a ed.)Covey, Sean. The 7 Habits of Highly Effective Teens Personal Workbook. Simon & Schuster, 2004.
Precaución: Estas citas no son 100% exactas.