APA (7th ed.) Citation

Gerstle , M., Courbet , G., & Proudhon , P. (1951). Gustave Courbet. Rupert Hart-Davis.

Chicago Style (17th ed.) Citation

Gerstle , Mack, Gustave Courbet , and Pierre-Joseph Proudhon. Gustave Courbet. Rupert Hart-Davis, 1951.

MLA (8th ed.) Citation

Gerstle , Mack, et al. Gustave Courbet. Rupert Hart-Davis, 1951.