Style de citation APA

Covey, S. R. (1990). Seven Habits of Highly Offective People: Restoring the Charactor Ethic. Fireside.

Style de citation Chicago

Covey, Stephen R. Seven Habits of Highly Offective People: Restoring the Charactor Ethic. New York: Fireside, 1990.

Style de citation MLA

Covey, Stephen R. Seven Habits of Highly Offective People: Restoring the Charactor Ethic. Fireside, 1990.

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