SILALAHI, I. V. 24 Jam Mesin Beroperasi: Bagaimana Bentuk Kebijakan Maintenance Mesin di Plant Oxidasi PT. Indorama Petrochemical?. Economics Professional in Action (E-Profit), [S. l.], v. 2, n. 01, p. 13–19, 2020. DOI: 10.37278/eprofit.v2i01.240. Disponível em: https://jurnalunibi.unibi.ac.id/ojs/index.php/eprofit/article/view/240. Acesso em: 2 jun. 2026.