Style de citation APA

Covey, S. R. (2004). The 7 habits of highly effective people. Pocket books.

Style de citation Chicago

Covey, Stephan R. The 7 Habits of Highly Effective People. London: Pocket books, 2004.

Style de citation MLA

Covey, Stephan R. The 7 Habits of Highly Effective People. Pocket books, 2004.

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