Sumber : Sumber :1. file:///D:/KULIAH/semester%204/retail%20management/tugas%20sampai%20UAS/Pertemuan%2012%20Manajemen%20Hubungan%20Pelanggan.pdf2. https://crmptaqua.blogspot.com/2019/05/penerapan-strategi-customer.html3. https://lintasmediadanawa.com/berita/crm-customer-relationship-management-adalah/4. https://www.kajianpustaka.com/2017/12/pengertian-tujuan-dan-dimensi-customer-relationship-management.html?m=1