APA (7th ed.) Citation

Helmer, M. (2006). Mühsamer Brückenbau.

Chicago Style (17th ed.) Citation

Helmer, Matthias. Mühsamer Brückenbau. 2006.

MLA (8th ed.) Citation

Helmer, Matthias. Mühsamer Brückenbau. 2006.

Warning: These citations may not always be 100% accurate.