APA (7th ed.) Citation

Ruhrberg, Schneckenburger, Fricke, & Honnef. L`art: Au XX siècle.

Chicago Style (17th ed.) Citation

Ruhrberg, Schneckenburger, Fricke, and Honnef. L`art: Au XX Siècle.

MLA (8th ed.) Citation

Ruhrberg, et al. L`art: Au XX Siècle.

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