Cohn, W. I. (1985). Five hundred years "Auf Der Treppen": A history of the Trepp family of Fulda. Year Book / Leo Baeck Institute.
Lua i Stíl Chicago (17ú heag.)Cohn, Warren I. "Five Hundred Years "Auf Der Treppen": A History of the Trepp Family of Fulda." Year Book / Leo Baeck Institute 1985.
Lua MLA (8ú heag.)Cohn, Warren I. "Five Hundred Years "Auf Der Treppen": A History of the Trepp Family of Fulda." Year Book / Leo Baeck Institute, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.