Haryanti, Erna -. 2021. “Analysis of the Agropolitan Area Development in the Sumber Sub-District, Probolinggo Regency in 2020”. JURNAL AGRI-TEK : Jurnal Penelitian Ilmu-Ilmu Eksakta 22 (1):39-46. https://doi.org/10.33319/agtek.v22i1.77.