Poppel, S. M. (1972). Salman Schocken and the Schocken Verlag: Stephen M. Poppel. Year Book / Leo Baeck Institute.
Lua i Stíl Chicago (17ú heag.)Poppel, Stephen M. "Salman Schocken and the Schocken Verlag: Stephen M. Poppel." Year Book / Leo Baeck Institute 1972.
Lua MLA (8ú heag.)Poppel, Stephen M. "Salman Schocken and the Schocken Verlag: Stephen M. Poppel." Year Book / Leo Baeck Institute, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.