Levine, H. I. (1963). Enduring and transitory elements in the philosophy of Samson Raphael Hirsch.
Lua i Stíl Chicago (17ú heag.)Levine, Howard I. Enduring and Transitory Elements in the Philosophy of Samson Raphael Hirsch. 1963.
Lua MLA (8ú heag.)Levine, Howard I. Enduring and Transitory Elements in the Philosophy of Samson Raphael Hirsch. 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.