Anggreani, N., S. Y. Widowati, and A. Santoso. “Penciptaan Loyalitas Pelanggan”. Jurnal Bingkai Ekonomi (JBE), Vol. 4, no. 1, Nov. 2019, pp. 1-12, https://itbsemarang.ac.id/sijies/index.php/jbe33/article/view/62.