Elfrida Yuliana Simamora et al. 2026. DIVERSITY OF MUSIC GENRES IN SUNDAY SERVICES OF HKBP CHURCH IN MEDAN CITY: THEOLOGICAL, CULTURAL, AND MUSIC MANAGEMENT PERSPECTIVES. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET). 5, 2 (Jan. 2026), 1611–1618. DOI:https://doi.org/10.5281/zenodo.18764671.