Style de citation APA

Covey, S. R. (1999). Seven habits of highly effective people (1st.). Pocket books.

Style de citation Chicago

Covey, Stephen R. Seven Habits of Highly Effective People. 1st. London: Pocket books, 1999.

Style de citation MLA

Covey, Stephen R. Seven Habits of Highly Effective People. 1st. Pocket books, 1999.

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