Gaya APA
Saputra, L.
(2013).
The 7 Habits of Highly Effective People
.
Tanggerang Selatan:
hak cipta undang undang.
Gaya MLA
Saputra, Lyndon.
"The 7 Habits of Highly Effective People".
Tanggerang Selatan:
hak cipta undang undang,
2013.
Text.