Knapp, G. Betz Architekten. Wasmuth.
Cita Chicago (17th ed.)Knapp, Gottfried. Betz Architekten. Tübingen: Wasmuth.
Cita MLA (8th ed.)Knapp, Gottfried. Betz Architekten. Wasmuth.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)