Yahya, A., & Maesaroh, I. (2021). Standard Operational Procedures for Congregational Services During The Covid-19 Pandemic at The Head Office Of Shafira Tour Travel Surabaya. Proceedings of International Conference on Da’wa and Communication, 3(1), 336-344. Retrieved from https://proceedings.uinsa.ac.id/index.php/ICONDAC/article/view/666