APA (7th ed.) Citation

Brandes, G., Kruger, O., & Butler, P. (1930). Voltaire. A.&C. Boni.

Chicago Style (17th ed.) Citation

Brandes, Georg, Otto Kruger, and Pierce Butler. Voltaire. New York: A.&C. Boni, 1930.

MLA (9th ed.) Citation

Brandes, Georg, et al. Voltaire. A.&C. Boni, 1930.