Czyż, P. P. (2013). "The jubilee of Ignacy Łopieński on the 50th anniversary of his creative activity": About an exhibition that did not take place at the National Museum in Warsaw in 1939.
Chicago Style (17th ed.) CitationCzyż, Piotr Paweł. "The Jubilee of Ignacy Łopieński on the 50th Anniversary of His Creative Activity": About an Exhibition That Did Not Take Place at the National Museum in Warsaw in 1939. 2013.
MLA (9th ed.) CitationCzyż, Piotr Paweł. "The Jubilee of Ignacy Łopieński on the 50th Anniversary of His Creative Activity": About an Exhibition That Did Not Take Place at the National Museum in Warsaw in 1939. 2013.
Warning: These citations may not always be 100% accurate.