Gaya APA
Covey, S, R.
(2010).
THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE
.
Tangerang:
Binarupa Aksara.
Gaya MLA
Covey, Stephen, R..
"THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE".
Tangerang:
Binarupa Aksara,
2010.
Text.