Gaya APA
Covey, Stephen R.. (2005).
The 8th Habit .
New York:
Free Press.
Gaya Chicago
Covey, Stephen R..
The 8th Habit.
New York:
Free Press,
2005.
Text.
Gaya MLA
Covey, Stephen R..
The 8th Habit.
New York:
Free Press,
2005.
Text.
Gaya Turabian
Covey, Stephen R..
The 8th Habit.
New York:
Free Press,
2005.
Print.