Não informado. (1964). Geographia Polonica. Polish Academy of Sciences, Institute of Geography and Spatial Organization.
Chicago-referens (17:e uppl.)Não informado. Geographia Polonica. Warsaw: Polish Academy of Sciences, Institute of Geography and Spatial Organization, 1964.
MLA-referens (8:e uppl.)Não informado. Geographia Polonica. Polish Academy of Sciences, Institute of Geography and Spatial Organization, 1964.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.