Gaya APA
BUTTLE, F. (2007).
CUSTOMER RELATIONSHIP MANAGEMENT: MANAJEMEN HUBUNGAN PELANGGAN (EDISI 1).
LLANGORD LANE:
ELSEVER.
Gaya MLA
BUTTLE, FRANCIS.
"CUSTOMER RELATIONSHIP MANAGEMENT: MANAJEMEN HUBUNGAN PELANGGAN".
EDISI 1
LLANGORD LANE:
ELSEVER,
2007.
Book.