MROZIEWSKI, Marian. Analysis of the level of development of morale among employees in national public administration institutions. Zeszyty Naukowe UPH seria Administracja i Zarządzanie, [S. l.], v. 38, n. 111, p. 199–212, 2019. Disponível em: https://czasopisma.uph.edu.pl/znadministracja/article/view/663. Acesso em: 22 lip. 2024.