Gaya APA
Barnes, J, G.
(2001).
SECRETS OF CUSTOMER RELATIONSHIP MANAGEMENT
(
1)
.
Yogyakarta:
Penerbit Andi.
Gaya MLA
Barnes, James, G.
"SECRETS OF CUSTOMER RELATIONSHIP MANAGEMENT".
1
Yogyakarta:
Penerbit Andi,
2001.
Text.