Siregar, H., Sinulingga, J., Purba, A. R., Damanik, R., & Herlina. (2026). The Relationship between Oukup Materials and Ecology and Language in the Karo Batak Ethnic Community: An Ecolinguistic Study. Jurnal Pembelajaran Bahasa Dan Sastra, 5(4), 3627–3634. https://doi.org/10.55909/jpbs.v5i4.1669