Habermann, J. (1998). Kaufmann Kohler and his teacher Samson Raphael Hirsch. Year Book / Leo Baeck Institute.
Lua i Stíl Chicago (17ú heag.)Habermann, Jacob. "Kaufmann Kohler and His Teacher Samson Raphael Hirsch." Year Book / Leo Baeck Institute 1998.
Lua MLA (8ú heag.)Habermann, Jacob. "Kaufmann Kohler and His Teacher Samson Raphael Hirsch." Year Book / Leo Baeck Institute, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.