Leftwich, J. (1958). Stefan Zweig and the world of yesterday: Joseph Leftwich. Year Book / Leo Baeck Institute.
Lua i Stíl Chicago (17ú heag.)Leftwich, Joseph. "Stefan Zweig and the World of Yesterday: Joseph Leftwich." Year Book / Leo Baeck Institute 1958.
Lua MLA (8ú heag.)Leftwich, Joseph. "Stefan Zweig and the World of Yesterday: Joseph Leftwich." Year Book / Leo Baeck Institute, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.