Nelamsari, A. “Pengaruh Customer Relationship Management (CRM) Dan Kualitas Layanan Terhadap Kepuasan Pelanggan ”. Surya Edunomics, Vol. 4, no. 1, May 2020, pp. 1-8, https://jurnal.umpwr.ac.id/index.php/suryaedunomics/article/view/2381.