Nickels, William G.
Marketing communications and promotion
Grid, INC , 1976
 Buku Teks SO
Yarker, K.A.
International marketing
Business Books, 1976
 Buku Teks SO
Buttle, Francis
Customer relationship management (manajemen hubungan pelanggan) : concept and tools = Customer relationship management
Bayumedia Publishing, 2007
 Buku Teks SO
Farrel Agastya Wibowo
Pengaruh Customer Relationship Management Terhadap Loyalitas Pelanggan: Studi Literatur Tahun 2019-2023 di Indonesia = The Impact of Customer Relationship Management on Customer Loyalty: A Literature Review from 2019-2023 in Indonesia
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2023
 UI - Makalah dan Kertas Kerja
Optimistic Marketing in Challenging Times: Serving Ever-Shifting Customer Needs
Springer Cham, 2023
 eBooks