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, Vol. 3, no. 05, Sept. 2024, pp. 1165-76, doi:10.63922/ijebir.v3i05.1185.