APA ציטוט

Covey, S. (1992). The seven habits of highly effective people. Simon & Schuster.

Chicago Style (17th ed.) Citation

Covey, Stephen. The Seven Habits of Highly Effective People. London: Simon & Schuster, 1992.

ציטוט MLA

Covey, Stephen. The Seven Habits of Highly Effective People. Simon & Schuster, 1992.