Hanafi, Meizar, Irham, and Lestari Rahayu Waluyati. “Factors Influencing Farmers’ Willingness to Pay for NPK Fertilizer in Specialty Coffee: Insights from Pagar Alam, Indonesia”. Research on World Agricultural Economy 5, no. 3 (September 27, 2024): 104–115. Accessed September 20, 2024. https://journals.nasspublishing.com/index.php/rwae/article/view/1121.