APA (7th ed.) Citation

Lucas, M. S., & Falls, C. B. (1943). Vast horizons. The Viking Press.

Chicago Style (17th ed.) Citation

Lucas, Mary Seymour, and C. B. Falls. Vast Horizons. New York: The Viking Press, 1943.

MLA (8th ed.) Citation

Lucas, Mary Seymour, and C. B. Falls. Vast Horizons. The Viking Press, 1943.