Siregar, H., Sinulingga, J., Purba, A.R., Damanik, R. and 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 (Jul. 2026), 3627–3634. DOI:https://doi.org/10.55909/jpbs.v5i4.1669.