APA (7th ed.) Citation

Williams, W. C., & Gregory, H. (1956). In the American grain: Essays. New Directions.

Chicago Style (17th ed.) Citation

Williams, William Carlos, and Horace Gregory. In the American Grain: Essays. New York: New Directions, 1956.

MLA (9th ed.) Citation

Williams, William Carlos, and Horace Gregory. In the American Grain: Essays. New Directions, 1956.