Integrated management systems and firm profitability: Multi-way fixed-effects evidence from Pakistani manufacturing firms . The Economics and Finance Letters, [S. l.], v. 13, n. 3, p. 61–73, 2026. DOI: 10.18488/29.v13i3.5094. Disponível em: https://archive.conscientiabeam.com/index.php/29/article/view/5094. Acesso em: 23 aug. 2026.