Herdiyansyah, Rikky. “PERANAN PENYULUHAN PERTANIAN TERHADAP PRODUKTIVITAS KERJA PETANI SAYURAN DI KECAMATAN KUMPEH ULU KABUPATEN MUARO JAMBI”. Jurnal Ilmiah Sosio-Ekonomika Bisnis 21, no. 2 (January 26, 2020): 122 - 128. Accessed January 6, 2025. https://online-journal.unja.ac.id/jseb/article/view/8612.