Gaya APA
Covey, S, R.
(2016).
How to succeed with people
(
1)
.
Surabaya:
PT Menuju Insan Cemerlang.
Gaya MLA
Covey, Stephen, R..
"How to succeed with people".
1
Surabaya:
PT Menuju Insan Cemerlang,
2016.
Text.