Citazione Stile APA (7a Edizione)

Covey, S. (1997). The 7 habits of highly effective families. Simon & Schuster.

Citazione stile Chigago Style (17a edizione)

Covey, Stephen. The 7 Habits of Highly Effective Families. New York: Simon & Schuster, 1997.

Citatione MLA (9a ed.)

Covey, Stephen. The 7 Habits of Highly Effective Families. Simon & Schuster, 1997.