APA (7th ed.) Citation

Spils, M., & Enke, W. (2013). Das Portrait.

Chicago Style (17th ed.) Citation

Spils, May, and Werner Enke. Das Portrait. 2013.

MLA (9th ed.) Citation

Spils, May, and Werner Enke. Das Portrait. 2013.

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