YASID, HAMDAN. “EFISIENSI PEMASARAN JAGUNG MANIS DI KOTA PEKANBARU”. Jurnal Ilmiah Pertanian 4, no. 2 (February 1, 2008): 8–17. Accessed January 25, 2026. https://journal.unilak.ac.id/index.php/jip/article/view/1345.