Farhan, Fikri, and Guruh Ghifar Zalzalah. “The Effect of Relationship Marketing on Consumer Loyalty in Local Fast-Food Restaurants in Yogyakarta”. KnE Social Sciences 7, no. 14 (September 28, 2022): 734–744. Accessed January 29, 2023. https://knepublishing.com/index.php/KnE-Social/article/view/12025.