IZDEBSKI, Hubert. E. N. Gladden, A History of Public Administration. Czasopismo Prawno-Historyczne, [S. l.], v. 27, n. 1, p. 151–154, 1975. DOI: 10.14746/cph.1975.27.1.9. Disponível em: https://pressto.amu.edu.pl/index.php/cph/article/view/52153. Acesso em: 4 sie. 2026.