Novikarumsari, Nurul Dwi, Siti Amanah, and Basita Ginting Sugihen. “Tingkat Difusi-Adopsi Inovasi Biogas Di Kecamatan Lembang Kabupaten Bandung Barat”. Jurnal Penyuluhan 10, no. 2 (August 24, 2015). Accessed January 22, 2021. http://jma.journal.ipb.ac.id/index.php/jupe/article/view/9923.