APA (7th ed.) Citation

Degas, E., Baumann, F. A., Karabelnik, M., & Boggs, J. S. (1994). Degas portraits. M. Holberton.

Chicago Style (17th ed.) Citation

Degas, Edgar, Felix Andreas Baumann, Marianne Karabelnik, and Jean Sutherland Boggs. Degas Portraits. London: M. Holberton, 1994.

MLA (8th ed.) Citation

Degas, Edgar, et al. Degas Portraits. M. Holberton, 1994.