Delvin, Kimberly
Customer service training
ATD Press, 2015
 Buku Teks SO
Carlaw, Peggy
The big book of sales training games : quick, fun activities for improving selling skills or livening up a sales meeting
McGraw-Hill, 1997
 Buku Teks SO
Evenson, Ren`ee
Customer service training IOI: quick and easy techniques that get great results
Amacom, 2005
 Buku Teks SO
Evenson, Renee, 1951-
Customer service training 101 : quick and easy techniques that get great results
American Society for Training and Development, 2005
 eBooks
Evenson, Renee, 1951-
Customer service training 101: quick and easy techniques that get great results
American Management Association, 2011
 eBooks