APA (7th ed.) Citation

Ruhrberg, K., & Walther, I. F. (1999). Arte del siglo XX. Taschen.

Chicago Style (17th ed.) Citation

Ruhrberg, Karl, and Ingo F. Walther. Arte Del Siglo XX. Köln [etc.]: Taschen, 1999.

MLA (9th ed.) Citation

Ruhrberg, Karl, and Ingo F. Walther. Arte Del Siglo XX. Taschen, 1999.

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