(1965). Reflections on Spengler. Year Book / Leo Baeck Institute.
Lua i Stíl Chicago (17ú heag.)"Reflections on Spengler." Year Book / Leo Baeck Institute 1965.
Lua MLA (8ú heag.)"Reflections on Spengler." Year Book / Leo Baeck Institute, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.