APA (7th ed.) Citation

Tolkien, J. R. R., Lee, A., & Tolkien, C. (2007). Narn i chin Hurin = the tale of the children of Hurin. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Tolkien, J. R. R., Alan Lee, and Christopher Tolkien. Narn I Chin Hurin = the Tale of the Children of Hurin. London: HarperCollins Publishers, 2007.

MLA (9th ed.) Citation

Tolkien, J. R. R., et al. Narn I Chin Hurin = the Tale of the Children of Hurin. HarperCollins Publishers, 2007.