Hanafi, Meizar, Irham, and Lestari Rahayu Waluyati. 2024. “Factors Influencing Farmers’ Willingness to Pay for NPK Fertilizer in Specialty Coffee: Insights from Pagar Alam, Indonesia”. Research on World Agricultural Economy 5 (3):104-15. https://doi.org/10.36956/rwae.v5i3.1121.