The efficiency of marketing strategies in health care - using social vouchers and coupons. Global Journal of Business, Economics and Management: Current Issues, [S. l.], v. 8, n. 3, p. 89–94, 2018. DOI: 10.18844/gjbem.v8i3.3649. Disponível em: https://un-pub.eu/ojs/index.php/gjbem/article/view/3649. Acesso em: 25 nov. 2024.