Não informado. (1956). Review of the Polish Academy of Sciences. Polish Academy of Sciences.
Chicago-referens (17:e uppl.)Não informado. Review of the Polish Academy of Sciences. Warsaw: Polish Academy of Sciences, 1956.
MLA-referens (8:e uppl.)Não informado. Review of the Polish Academy of Sciences. Polish Academy of Sciences, 1956.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.