Gaya APA
Covey, S, R.
(1997).
The 7Habits Of Highly Effectife people
(
Pertama)
.
Jakarta:
Bina Rupa Aksara.
Gaya MLA
Covey, Stephen, R..
"The 7Habits Of Highly Effectife people".
Pertama
Jakarta:
Bina Rupa Aksara,
1997.
.