Harbelubun, Harto Rahmat, and Setyawan Widyarto. 2021. “MENENTUKAN LAHAN TANAMAN APEL DENGAN CLUSTERING CITRA DIGITAL TANAH”. Proceedings of the Informatics Conference 6 (11):41-44. https://ojs.journals.unisel.edu.my/index.php/icf/article/view/75.