APA (7th ed.) Citation

Tyler, J. E. A., & Tolkien, J. R. R. (1976). The Tolkien companion. St. Martin's Press.

Chicago Style (17th ed.) Citation

Tyler, J. E. A., and J. R. R. Tolkien. The Tolkien Companion. New York: St. Martin's Press, 1976.

MLA (8th ed.) Citation

Tyler, J. E. A., and J. R. R. Tolkien. The Tolkien Companion. St. Martin's Press, 1976.