Irma Yuli Aritonang, Robert Sibarani and Alemina Br Perangin-Angin 2022. Local Wisdom of the Martumba Tradition of the Toba Batak Community in Sianjur Mula-Mula Village, Samosir Regency, North Sumatra: Anthropolinguistic Study. East Asian Journal of Multidisciplinary Research . 1, 11 (Dec. 2022), 2417–2424. DOI:https://doi.org/10.55927/eajmr.v1i11.2341.