Gaya APA
Covey, S, R.
(2013).
The 7 Habits Of Highly Effective People
.
Tangerang Selatan:
Binarupa Aksar.
Gaya MLA
Covey, Stephen, R..
"The 7 Habits Of Highly Effective People".
Tangerang Selatan:
Binarupa Aksar,
2013.
Text.