Lange, G. (2004). Josef Baron (1874-1953): Gerhard Lange. Wichmann-Jahrbuch.
Cita Chicago (17th ed.)Lange, Gerhard. "Josef Baron (1874-1953): Gerhard Lange." Wichmann-Jahrbuch 2004.
Cita MLA (8th ed.)Lange, Gerhard. "Josef Baron (1874-1953): Gerhard Lange." Wichmann-Jahrbuch, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.