Firdiansyah, Ryan, Basneldi Basneldi, IG.N.Willy Hermawan, Muzayyanah Yuliasih, and Bekti Setiadi. “THE IMPACT OF COVID 19 ON THE UMRAH AND HAJJ BUSINESS PLUS IN EAST JAKARTA”. Dinasti International Journal of Management Science 2, no. 2 (November 5, 2020): 174–179. Accessed May 4, 2024. https://dinastipub.org/DIJMS/article/view/579.