Penggayaan APA
Covey. (2004).
The 7 habits of highly effective people : powerful lessons in personal change .
New York:
Simon & Schuster.
Chicago Style
Covey.
The 7 habits of highly effective people : powerful lessons in personal change.
New York:
Simon & Schuster,
2004.
Text.
MLA Style
Covey.
The 7 habits of highly effective people : powerful lessons in personal change.
New York:
Simon & Schuster,
2004.
Text.
Turabian Style
Covey.
The 7 habits of highly effective people : powerful lessons in personal change.
New York:
Simon & Schuster,
2004.
Print.