APA (7th ed.) Citation

Christoffel, U. (1938). Wiener Aquarelle.

Chicago Style (17th ed.) Citation

Christoffel, Ulrich. Wiener Aquarelle. 1938.

MLA (9th ed.) Citation

Christoffel, Ulrich. Wiener Aquarelle. 1938.

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