Putri, Lasma Elfrida, Hermandra Hermandra, and Mangatur Sinaga. 2023. “Umpasa Pada Ulaon Sadari Pernikahan Batak Toba Analisis Semantik Kognitif”. Journal of Education Research 4 (4):2091-97. https://doi.org/10.37985/jer.v4i4.584.