APA Style
(1071001117), Y. (2011).
Customer Retention Management PT. Wahana Kalyanamitra Mahardika .
Jakarta:
Universitas Bakrie.
MLA Style
(1071001117), Yusuf.
"Customer Retention Management PT. Wahana Kalyanamitra Mahardika".
Jakarta:
Universitas Bakrie,
2011.
Printed.