APA-Zitierstil (7. Ausg.)

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

Chicago-Zitierstil (17. Ausg.)

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

MLA-Zitierstil (9. Ausg.)

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