WICO JONTARUDI TARIGAN; VITRYANI TARIGAN; FARIAMAN PURBA. OPERATIONAL COST BUDGET ANALYSIS AS A SUPERVISORY TOOL AT PT. PARBEN. S MEDAN. European Scholar Journal, [S. l.], v. 2, n. 11, p. 73-80, 2021. Disponível em: https://scholarzest.com/index.php/esj/article/view/1449. Acesso em: 31 jan. 2025.