APA (7th ed.) Citation

Bark, W. C., & Gorey, E. (1958). Origins of the medieval world. Doubleday.

Chicago Style (17th ed.) Citation

Bark, William Carroll, and Edward Gorey. Origins of the Medieval World. Garden City, N.Y.: Doubleday, 1958.

MLA (9th ed.) Citation

Bark, William Carroll, and Edward Gorey. Origins of the Medieval World. Doubleday, 1958.