Gaya APA
Covey, S, R.
(1997).
The 7 Habits Of Highly Effective People
(
Cet.1)
.
Jakarta:
binarupa Aksara.
Gaya MLA
Covey, Stephen, R..
"The 7 Habits Of Highly Effective People".
Cet.1
Jakarta:
binarupa Aksara,
1997.
Text.