Harahap, R. Hamdani, Abdul Rauf, Rahmawaty, Isfenti Sadalia, Farid Aulia, and Abdullah Akhyar Nasution. 2025. “Adoption of Good Agricultural Practices (GAP) Among Arabica Coffee Farmers in Simalungun, Indonesia”. Research on World Agricultural Economy 6 (4):191–204. https://doi.org/10.36956/rwae.v6i4.1897.