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Lua i Stíl Chicago (17ú heag.)Białowolski, Piotr, Janusz Czapiński, Izabela Grabowska, Irena E. Kotowska, Tomasz Panek, Paweł Strzelecki, agus Dorota Węziak-Białowolska. Household Living Conditions. University of Economics and Human Sciences in Warsaw, 2011.
Lua MLA (9ú heag.)Białowolski, Piotr, et al. Household Living Conditions. University of Economics and Human Sciences in Warsaw, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.