Nugroho, Tri. “ PERAN PENYULUH PERTANIAN DALAM PELESTARIAN ALAM”. Jurnal Ilmu-Ilmu Pertanian 3, no. 2 (July 15, 2007): 100–111. Accessed May 11, 2025. https://jiip.polbangtanyoma.ac.id/index.php/jiip/article/view/243.