Hill, L. E. (1993). Walter Gyssling, the Centralverein and the Büro Wilhelmstraße, 1929-1933. Year book / Leo Baeck Institute.
Čikaški stil citiranja (17. izdanje)Hill, Leonidas E. "Walter Gyssling, the Centralverein and the Büro Wilhelmstraße, 1929-1933." Year Book / Leo Baeck Institute 1993.
MLA način citiranja (8. izdanje)Hill, Leonidas E. "Walter Gyssling, the Centralverein and the Büro Wilhelmstraße, 1929-1933." Year Book / Leo Baeck Institute, 1993.
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