APA (7th ed.) Citation

Gordon, R., Degas, E., & Forge, A. (1988). Degas. H.N. Abrams.

Chicago Style (17th ed.) Citation

Gordon, Robert, Edgar Degas, and Andrew Forge. Degas. New York: H.N. Abrams, 1988.

MLA (9th ed.) Citation

Gordon, Robert, et al. Degas. H.N. Abrams, 1988.