Gaya APA
Covey, S, R.
(2015).
The 7 Habits of Highly Effective People
(
cet.1)
.
Jakarta:
Dunamis Publihing.
Gaya MLA
Covey, Stephen, R..
"The 7 Habits of Highly Effective People".
cet.1
Jakarta:
Dunamis Publihing,
2015.
Buku.