Andri Ramadhan, Muslikhun. “Analisis Efisiensi Operasional Dan Pengendalian Biaya Di Pabrik Minyak Goreng PT Mahesi Agri Karya Surabaya”. Social Sciences Journal, May 2024, pp. 38-46, https://journal.pdphi.com/index.php/SSJ/article/view/57.