Gaya APA
Covey, S, R.
(1997).
The 7 Habits of Highly Effecive People
.
Jakarta:
Binarupa Aksara.
Gaya MLA
Covey, Stephen, R.
"The 7 Habits of Highly Effecive People".
Jakarta:
Binarupa Aksara,
1997.
Text.