APA (7th ed.) Citation

Ruhrberg, K., Schneckenburger, M., & Fricke, C. Arte del siglo XX.

Chicago Style (17th ed.) Citation

Ruhrberg, Karl, Manfred Schneckenburger, and Christiane Fricke. Arte Del Siglo XX.

MLA (8th ed.) Citation

Ruhrberg, Karl, et al. Arte Del Siglo XX.

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