APA (7th ed.) Citation

Feuchtwanger, L., Muir, W., & Muir, E. (1928). The ugly duchess. The Viking Press.

Chicago Style (17th ed.) Citation

Feuchtwanger, Lion, Willa Muir, and Edwin Muir. The Ugly Duchess. New York: The Viking Press, 1928.

MLA (9th ed.) Citation

Feuchtwanger, Lion, et al. The Ugly Duchess. The Viking Press, 1928.