Gaya APA
Covey, Stephen. (2013).
The 7 Habits of Highly Effective People .
London:
Simon & Schuster.
Gaya Chicago
Covey, Stephen.
The 7 Habits of Highly Effective People.
London:
Simon & Schuster,
2013.
Non-fiction.
Gaya MLA
Covey, Stephen.
The 7 Habits of Highly Effective People.
London:
Simon & Schuster,
2013.
Non-fiction.
Gaya Turabian
Covey, Stephen.
The 7 Habits of Highly Effective People.
London:
Simon & Schuster,
2013.
Non-fiction.