MROZIEWSKI, Marian. Analysis of the level of development of morale among employees in national public administration institutions. Management and Administration Journal, [S. l.], v. 38, n. 111, p. 199–212, 2019. Disponível em: https://czasopisma.uph.edu.pl/znadministracja/article/view/663. Acesso em: 22 jan. 2025.