Cita APA (7a ed.)

Covey, S. R. (1990). The seven habits of highly effective people: Restoring the character ethic (1st Fireside ed.). Fireside.

Cita Chicago Style (17a ed.)

Covey, Stephen R. The Seven Habits of Highly Effective People: Restoring the Character Ethic. 1st Fireside ed. New York: Fireside, 1990.

Cita MLA (9a ed.)

Covey, Stephen R. The Seven Habits of Highly Effective People: Restoring the Character Ethic. 1st Fireside ed. Fireside, 1990.