Mantau, Zulkifli. “ANALISIS INVESTASI USAHATANI KEDELAI VARIETAS TANGGAMUS DI KABUPATEN GORONTALO”. AGRI-SOSIOEKONOMI 11, no. 1 (March 3, 2015): 1–10. Accessed January 20, 2026. https://ejournal.unsrat.ac.id/v3/index.php/jisep/article/view/7165.