Lewandowska, M. T. (1954). The Polish Immigrant in Philadelphia to 1914 (Part 2). Philadelphia.
Lua i Stíl Chicago (17ú heag.)Lewandowska, M. Theodosetta. The Polish Immigrant in Philadelphia to 1914 (Part 2). Philadelphia, 1954.
Lua MLA (8ú heag.)Lewandowska, M. Theodosetta. The Polish Immigrant in Philadelphia to 1914 (Part 2). Philadelphia, 1954.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.