Style de citation APA (7e éd.)

Covey, S. R. (2020). 7 Habits of Highly Effective People. Simon and Schuster.

Style de citation Chicago (17e éd.)

Covey, Stephen R. 7 Habits of Highly Effective People. New Delhi: Simon and Schuster, 2020.

Style de citation MLA (9e éd.)

Covey, Stephen R. 7 Habits of Highly Effective People. Simon and Schuster, 2020.