RADZILOWSKY, J. The Communist Party of the United States of America since 1919. Pamięć i Sprawiedliwość, [S. l.], v. 32, n. 2, p. 15–26, 2018. Disponível em: https://czasopisma.ipn.gov.pl/index.php/pis/article/view/59. Acesso em: 9 lis. 2024.