Kasmir
Etika customer service
RajaGrafindo Persada, 2005
 Buku Teks
Kasmir
Etika customer service / Kasmir
RajaGrafindo Persada, 2005
 Buku Teks
Evenson, Renee, 1951-
Award-winning customer service : 101 ways guarantee great performance
Society for Industrial and Applied Mathematics, 2007
 eBooks
Gallagher, Richard S.
The customer service survival kit: what to say to defuse even the worst customer situations
[American Management Association, ], 2013
 eBooks
Evenson, Ren`ee
Customer service training IOI: quick and easy techniques that get great results
Amacom, 2005
 Buku Teks