Gaya APA
Covey, S, R.
(2004).
The 8 Th Habit : From Effectiveness To Greatness
(
Cet.1)
.
sydney:
Simon & Schuster.
Gaya MLA
Covey, Stephen, R..
"The 8 Th Habit : From Effectiveness To Greatness".
Cet.1
sydney:
Simon & Schuster,
2004.
FKIP-Penjas.