Kristiani, Y., Tawakkal, and Saiful. “The Role of Farmers in Conserving Incense Cultivation in Hutagurgur Village Humbang Hasundutan District”. TGO Journal of Education, Science and Technology, vol. 1, no. 1, Jan. 2023, pp. 89-97, doi:10.56070/tgojest.v1i1.31.