APA (7th ed.) Citation

Ettel, P., & Wunschel, A. (2014). Regensburg - Metropole an der Donau.

Chicago Style (17th ed.) Citation

Ettel, Peter, and Andreas Wunschel. Regensburg - Metropole an Der Donau. 2014.

MLA (9th ed.) Citation

Ettel, Peter, and Andreas Wunschel. Regensburg - Metropole an Der Donau. 2014.

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