THE EFFECT OF CAPITAL STRUCTURE ON PROFITABILITY OF NORTH AMERICAN OILFIELD SERVICE COMPANIES. World Economics and Finance Bulletin, [S. l.], v. 25, p. 152–168, 2023. Disponível em: https://www.scholarexpress.net/index.php/wefb/article/view/3119. Acesso em: 18 apr. 2026.