APA (7th ed.) Citation

Tolkien, J., Lee, A., & Tolkien, C. (2007). The tale of the Children of Hurin. Harper Collins Publishers.

Chicago Style (17th ed.) Citation

Tolkien, J.R.R, Alan Lee, and Christopher Tolkien. The Tale of the Children of Hurin. London: Harper Collins Publishers, 2007.

MLA (9th ed.) Citation

Tolkien, J.R.R, et al. The Tale of the Children of Hurin. Harper Collins Publishers, 2007.