Edwin, Muli. “Penilaian Karakteristik Tanah Di Taman Botani Dan Hulu Sungai Sungai Sangatta”. Jurnal Pertanian Terpadu 1, no. 2 (November 30, 2013): 98–115. Diakses Maret 14, 2026. https://ojs.mine-cloud.my.id/index.php/jpt/article/view/54.