APA (7th ed.) Citation

Feuchtwanger, L., Muir, W., & Muir, E. (1927). The ugly duchess: A historical romance. M. Secker.

Chicago Style (17th ed.) Citation

Feuchtwanger, Lion, Willa Muir, and Edwin Muir. The Ugly Duchess: A Historical Romance. London: M. Secker, 1927.

MLA (8th ed.) Citation

Feuchtwanger, Lion, et al. The Ugly Duchess: A Historical Romance. M. Secker, 1927.