Gaya APA
COVEY, S, R.
(1997).
The 7 Habits Of Highly Effective People
(
Cetakan Pertama)
.
Jakarta:
Binarupa Aksara.
Gaya MLA
COVEY, Stephen, R..
"The 7 Habits Of Highly Effective People".
Cetakan Pertama
Jakarta:
Binarupa Aksara,
1997.
.