Kahn, L. (1973). Ludwig Robert: Rahel's brother. Year Book / Leo Baeck Institute.
Chicago-Zitierstil (17. Ausg.)Kahn, Lothar. "Ludwig Robert: Rahel's Brother." Year Book / Leo Baeck Institute 1973.
MLA-Zitierstil (8. Ausg.)Kahn, Lothar. "Ludwig Robert: Rahel's Brother." Year Book / Leo Baeck Institute, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.