Junaedi, Ajeng Syadiar. “Efisiensi Agronomis Dan Ekonomis Pemupukan NPK Pada Tanaman Kopi: Systematic Literature Review”. Jurnal Sosial dan Sains 6, no. 9 (September 28, 2026): 295–306. Accessed November 13, 2026. https://sosains.greenvest.co.id/index.php/sosains/article/view/32795.