Gaya APA
Covey, S, R. (2000).
Living The 7 (Seven) Habits The Courage to Change .
United Kindom:
Simon & Schuster UK Ltd.
Gaya MLA
Covey, Stephen, R.
"Living The 7 (Seven) Habits The Courage to Change".
United Kindom:
Simon & Schuster UK Ltd,
2000.
Text.