Obero, C. ., E. . Habla, A. M. . Sabijon, and D. J. . Saliente. “Evaluation on the Customer Relationship Towarads the Operation of Angel’s Burger; Basis for Customer Retention Strategies: Vol.4, No.1”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research, vol. 4, no. 1, June 2024, https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/13577.