Kasmir
Etika customer service / Kasmir
RajaGrafindo Persada, 2005
 Buku Teks
Kasmir
Etika customer service
RajaGrafindo Persada, 2005
 Buku Teks
Storbacka, Kaj
Customer relationship management
Mcgraw-Hill, 2001
 Buku Teks
Gallagher, Richard S.
The customer service survival kit: what to say to defuse even the worst customer situations
[American Management Association, ], 2013
 eBooks
Gallagher, Richard S.
Great customer connections: simple psychological techniques that guarantee exceptional service
American Management Association, 2006
 eBooks