Sembiring, S., & Ginting, R. (2019). THE ROLE OF SURAT UKAT IN KARO SINGALOR LAU KARO DISTRICT. Linguistika: Buletin Ilmiah Program Magister Linguistik Universitas Udayana, 26(1), 1--7. doi:10.24843/ling.2019.v26.i01.p01