PIORUNOWSKA-KOKOSZKO, J. GROUP PURCHASING ORGANIZATION (GPO) AS A MEANS OF BUSINESS COSTS SAVINGS. Journal of Positive Management, [S. l.], v. 6, n. 1, p. 56–70, 2015. DOI: 10.12775/JPM.2015.005. Disponível em: https://apcz.umk.pl/JPM/article/view/JPM.2015.005. Acesso em: 18 jul. 2024.