Stephen R Covey. (2004). The 7 habits Of Highly Effective People. Pocket Books.
Style de citation ChicagoStephen R Covey. The 7 Habits Of Highly Effective People. London: Pocket Books, 2004.
Style de citation MLAStephen R Covey. The 7 Habits Of Highly Effective People. Pocket Books, 2004.
Attention : ces citations peuvent ne pas être correctes à 100%.