Badziak, K. (1991). Great Capitalists Fortunes in the Polish Lands before 1939 (The Case of the Poznanski Family). Polin.
Chicago-referens (17:e uppl.)Badziak, Kazimierz. "Great Capitalists Fortunes in the Polish Lands Before 1939 (The Case of the Poznanski Family)." Polin 1991.
MLA-referens (8:e uppl.)Badziak, Kazimierz. "Great Capitalists Fortunes in the Polish Lands Before 1939 (The Case of the Poznanski Family)." Polin, 1991.
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