Siregar, D., & Gulo, Y. (2020). Eksistensi Parmalim Mempertahankan Adat dan Budaya Batak Toba di Era Modern. Anthropos: Jurnal Antropologi Sosial Dan Budaya (Journal of Social and Cultural Anthropology), 6(1), 41–51. https://doi.org/10.24114/antro.v6i1.16632