APA (7th ed.) Citation

Tolkien, J. R. R., & Tolkien, C. (1990). The war of the ring: The history of the Lord of the rings, part three. Unwin Hyman.

Chicago Style (17th ed.) Citation

Tolkien, J. R. R., and Christopher Tolkien. The War of the Ring: The History of the Lord of the Rings, Part Three. London: Unwin Hyman, 1990.

MLA (8th ed.) Citation

Tolkien, J. R. R., and Christopher Tolkien. The War of the Ring: The History of the Lord of the Rings, Part Three. Unwin Hyman, 1990.