Ruth Melody Misbow Siallagan, Mauly Purba, Vanesia Amelia Sebayang, and Junita Batubara. 2025. “THE SINGING CHURCH: AN ANALYSIS OF VOCAL DEVIATIONS IN CONGREGATIONAL SINGING - A STUDY OF HKBP CONGREGATIONAL SINGING TECHNIQUES”. Multidiciplinary Output Research For Actual and International Issue (MORFAI) 6 (2):1371-78. https://doi.org/10.54443/morfai.v6i2.4843.