Ronneberger, K. (2000). Fallstricke in Frankfurt. Bauwelt.
Cita Chicago (17th ed.)Ronneberger, Klaus. "Fallstricke in Frankfurt." Bauwelt 2000.
Cita MLA (8th ed.)Ronneberger, Klaus. "Fallstricke in Frankfurt." Bauwelt, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.