APA (7th ed.) Citation

Covey, S. R. (1990). The 7 habits of highly effective people: Restoring the character ethic. Simon & Schuster Ltd.

Chicago Style (17th ed.) Citation

Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. London: Simon & Schuster Ltd, 1990.

MLA (8th ed.) Citation

Covey, Stephen R. The 7 Habits of Highly Effective People: Restoring the Character Ethic. Simon & Schuster Ltd, 1990.