Biblioteka Narodowa (Warszawa). (1991). Polish Libraries Today. National Library.
Style de citation Chicago (17e éd.)Biblioteka Narodowa (Warszawa). Polish Libraries Today. Warsaw: National Library, 1991.
Style de citation MLA (9e éd.)Biblioteka Narodowa (Warszawa). Polish Libraries Today. National Library, 1991.
Attention : ces citations peuvent ne pas être correctes à 100%.