Covey, S. R. (2015). Primary greatness: The 12 levers of success (First Simon & Schuster hardcover edition.). Simon & Schuster.
Style de citation Chicago (17e éd.)Covey, Stephen R. Primary Greatness: The 12 Levers of Success. First Simon & Schuster hardcover edition. New York: Simon & Schuster, 2015.
Style de citation MLA (8e éd.)Covey, Stephen R. Primary Greatness: The 12 Levers of Success. First Simon & Schuster hardcover edition. Simon & Schuster, 2015.
Attention : ces citations peuvent ne pas être correctes à 100%.