Gaya APA
Covey, Stephen R.. (1989).
The Seven Habits of Highly Effective People .
New York:
Simon And Schuster.
Gaya Chicago
Covey, Stephen R..
The Seven Habits of Highly Effective People.
New York:
Simon And Schuster,
1989.
Text.
Gaya MLA
Covey, Stephen R..
The Seven Habits of Highly Effective People.
New York:
Simon And Schuster,
1989.
Text.
Gaya Turabian
Covey, Stephen R..
The Seven Habits of Highly Effective People.
New York:
Simon And Schuster,
1989.
Print.