Gaya APA
Covey, S, R.
(2017).
the 7 Habits of Highly Effective People
(
Cetakan 2)
.
jakarta:
Dunamis.
Gaya MLA
Covey, Stephen, R..
"the 7 Habits of Highly Effective People".
Cetakan 2
jakarta:
Dunamis,
2017.
Text.