Lucas, Robert W.
Customer service : skills for success
McGrow-Hill, 2015
Buku Teks
Kamin, Maxine
10 steps to successful customer service
American Society for Training & Development, 2010
eBooks
Kasmir
Etika customer service / Kasmir
RajaGrafindo Persada, 2005
Buku Teks
Kasmir
Etika customer service
RajaGrafindo Persada, 2005
Buku Teks
Harris, Elaine K
Customer service : a practical approach / Elaine K. Harris
Pearson , 2013
Buku Teks