Levi, E., & Gehring, M. Paul Hirsch and Alfred Einstein: The trials and tribulations of collaboration in exile. The impact of nazism on twentieth-century music.
Lua i Stíl Chicago (17ú heag.)Levi, Erik, agus Melina Gehring. "Paul Hirsch and Alfred Einstein: The Trials and Tribulations of Collaboration in Exile." The Impact of Nazism on Twentieth-century Music .
Lua MLA (8ú heag.)Levi, Erik, agus Melina Gehring. "Paul Hirsch and Alfred Einstein: The Trials and Tribulations of Collaboration in Exile." The Impact of Nazism on Twentieth-century Music, .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.