Cunningham, Michael J.
Customer relationship management
Capstone, 2002
 Buku Teks
Customer relationship management
 Buku Teks
Buttle, francais
Customer relationship management: concepts and technologies
Elsevier/Butterworth-Heinemann, 2009
 Buku Teks
Daniel
Evaluasi atas konsep-konsep customer relationship management
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2003
 UI - Skripsi Membership
Harvard business review on customer relationship management
Harvard Business School Publication, 2001
 Buku Teks