APA (7th ed.) Citation

Tolkien, J. R. R., & Tolkien, C. (1992). The War of the ring: The history of the Lord of the rings, part 3. Grafton.

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 3. London: Grafton, 1992.

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 3. Grafton, 1992.