Gaya APA
Covey, S, R.
(2017).
The 7 Habits of Highly Effective People
.
Jakarta:
Dunamis Intra Sarana.
Gaya MLA
Covey, Stephen, R..
"The 7 Habits of Highly Effective People".
Jakarta:
Dunamis Intra Sarana,
2017.
TEXT.