Customer service : hot seat dvd
McGraw-Hill/Irwin, 2005
 Multimedia
Customer service : hot seat dvd
McGraw-Hill/Irwin, 2005
 Multimedia
Knapp, Donna
A guide to customer service skills for the help desk professional
Course Technology, Cengage Learning, 2011
 Buku Teks
Syarifah Fatimah Fitria
Segmentasi konsumen berdasarkan customer lifetime value menggunakan analisis big data = Customer segmentation based on customer lifetime value using big data analytics
Fakultas Eknonomi dan Bisnis Universitas Indonesia, 2018
 UI - Tesis (Membership)
Suharto Abdul Masjid
Customer service dalam bisnis jasa transportasi
Rajawali Grafindo Persada, 2009
 Buku Teks