Cita APA

Covey,Stephen R. (2002). First things first: To live,to love,to learn to leave a legacy. Pocket Books..

Citación estilo Chicago

Covey,Stephen R. First Things First: To Live,to Love,to Learn to Leave a Legacy. London: Pocket Books., 2002.

Cita MLA

Covey,Stephen R. First Things First: To Live,to Love,to Learn to Leave a Legacy. Pocket Books., 2002.