APA (7th ed.) Citation

Tyler, J. E. A. (1979). The new Tolkien companion (1st rev. printing.). Avon Books.

Chicago Style (17th ed.) Citation

Tyler, J. E. A. The New Tolkien Companion. 1st rev. printing. New York, N.Y.: Avon Books, 1979.

MLA (8th ed.) Citation

Tyler, J. E. A. The New Tolkien Companion. 1st rev. printing. Avon Books, 1979.