Gaya APA
Covey, S.
(1977).
The 7 Habits Of Highly Efective People
(
Cet. 1)
.
Jakarta:
Binarupa Aksara.
Gaya MLA
Covey, Stephen.R.
"The 7 Habits Of Highly Efective People".
Cet. 1
Jakarta:
Binarupa Aksara,
1977.
Text.