“Penentuan Biaya Pokok Produksi Pada Usaha Ikan Salai Di Kecamatan Rantau Kopar Kabupaten Rokan Hilir”. Community Engagement and Emergence Journal (CEEJ) 6, no. 1 (January 21, 2025): 7–11. Accessed May 25, 2026. https://journal.yrpipku.com/index.php/ceej/article/view/7034.