Haryanti, Erna -. “Analysis of the Agropolitan Area Development in the Sumber Sub-District, Probolinggo Regency in 2020”. JURNAL AGRI-TEK : Jurnal Penelitian Ilmu-Ilmu Eksakta 22, no. 2 (December 23, 2021): 66–72. Accessed October 23, 2026. https://agritek.unmermadiun.ac.id/index.php/agritek/article/view/76.