Covey, S. R., Merrill, A. R., & Merrill, R. R. (1994). First things first: To live, to love, to learn, to leave a legacy. Simon & Schuster, Pocket Books.
Cita Chicago (17th ed.)Covey, Stephen R., A. Roger Merrill, i Rebecca R. Merrill. First Things First: To Live, to Love, to Learn, to Leave a Legacy. New York : London: Simon & Schuster, Pocket Books, 1994.
Cita MLA (8th ed.)Covey, Stephen R., et al. First Things First: To Live, to Love, to Learn, to Leave a Legacy. Simon & Schuster, Pocket Books, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.