Sonia Anjelica, and Muhammad Huseini. “Factors Influencing Coffee Farmers’ Income in Kisam Tinggi District, Ogan Komering Ulu (OKU) Selatan Regency: A Case Study of Simpang Empat Village”. International Journal of Economics, Business and Innovation Research 3, no. 05 (September 13, 2024): 1165-1176. Accessed November 4, 2026. https://e-journal.citakonsultindo.or.id/index.php/IJEBIR/article/view/1185.