Gaya APA
COVEY, S, R.
(1997).
The 77 Habits of Highly Effektive People
.
Jakarta:
Binarupa Aksara.
Gaya MLA
COVEY, Stephen, R.
"The 77 Habits of Highly Effektive People".
Jakarta:
Binarupa Aksara,
1997.
Text.