Gaya APA
Covey, Stephen R.. (1990).
7 Habits of Highly Effective People, The : Powerful Lessons in Personal Change (First Edition).
New York, USA:
Simon & Schuster.
Gaya Chicago
Covey, Stephen R..
7 Habits of Highly Effective People, The : Powerful Lessons in Personal Change.
First Edition
New York, USA:
Simon & Schuster,
1990.
Academic.
Gaya MLA
Covey, Stephen R..
7 Habits of Highly Effective People, The : Powerful Lessons in Personal Change.
First Edition
New York, USA:
Simon & Schuster,
1990.
Academic.
Gaya Turabian
Covey, Stephen R..
7 Habits of Highly Effective People, The : Powerful Lessons in Personal Change.
First Edition
New York, USA:
Simon & Schuster,
1990.
Academic.