O. E. SIMANJUNTAK, L. S. Sinaga, and S. Bahri, “THE COMMUNICATIVE FUNCTIONS OF ULAON POGU NI ALAMAN IN EXHUMATION (MANGONGKAL HOLI) A FUNERAL CEREMONY IN TOBA BATAK”, Linguistica, vol. 9, no. 2, pp. 299–307, Jul. 2020.