Tri Martial, Ummu Harmain, Ahmad Rizki Harahap, Mitra Musika, & Muhammad Arief Tirtana. (2024). Enhancing Farm Household Income Through Efficient Arabica Coffee Cultivation In Simalungun, North Sumatera. Jurnal AGRISEP: Kajian Masalah Sosial Ekonomi Pertanian Dan Agribisnis, 23(02), 425–452. https://doi.org/10.31186/jagrisep.23.02.425-452