Gaya APA
Covey, S, R.
(1997).
THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE
(
Edisi Revisi)
.
Jakarta:
Binarupa Aksara.
Gaya MLA
Covey, Stephen, R..
"THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE".
Edisi Revisi
Jakarta:
Binarupa Aksara,
1997.
.