APA aipamena

Covey, S. R. (2004). The 8th habit: From effectiveness to greatness. Simon & Schuster.

Chicago Style aipamena

Covey, Stephen R. The 8th Habit: From Effectiveness to Greatness. New York: Simon & Schuster, 2004.

MLA aipamena

Covey, Stephen R. The 8th Habit: From Effectiveness to Greatness. Simon & Schuster, 2004.