Sudirjo, F., F. Faridah, W. S. Astutik, and A. Y. Vandika. “The Effect of Customer Relationship Management, Digital Advertising, and Discount Programs on Customer Loyalty at Start-Ups in Jakarta”. West Science Interdisciplinary Studies, vol. 2, no. 07, July 2024, pp. 1434-43, doi:10.58812/wsis.v2i07.1101.