APA (7th ed.) Citation

Tolkien, J., & Tolkien, C. (2007). The children of Hurin. Pocket Books.

Chicago Style (17th ed.) Citation

Tolkien, J.R.R, and Christopher Tolkien. The Children of Hurin. New York: Pocket Books, 2007.

MLA (9th ed.) Citation

Tolkien, J.R.R, and Christopher Tolkien. The Children of Hurin. Pocket Books, 2007.