Yuliani, W., S. . Syafrizal, and S. . Lenggogeni. “Loyalty Model In Umrah Religious Tourism Travel and Factors That Influence It (Study on Ajwa Tours Indonesia)”. EScience Humanity Journal, vol. 4, no. 2, July 2024, pp. 278-87, doi:10.37296/esci.v4i2.135.