Isyandi, Bernard. “Potential Food Crop Production and Food Security in Kampar Regency of Riau Province”. TRIKONOMIKA : Jurnal Ekonomi 15, no. 2 (December 29, 2016): 58–65. Accessed May 4, 2025. https://www.journal.unpas.ac.id/index.php/trikonomika/article/view/384.