Style de citation APA

Covey, S. R. (2004). The 8th habit: From effectiveness to greatness. Simon & Schoster.

Style de citation Chicago

Covey, Stephen R. The 8th Habit: From Effectiveness to Greatness. London: Simon & Schoster, 2004.

Style de citation MLA

Covey, Stephen R. The 8th Habit: From Effectiveness to Greatness. Simon & Schoster, 2004.

Attention : ces citations peuvent ne pas être correctes à 100%.