APA (7th ed.) Citation

Tolkien, J. R. R., & Tolkien, C. (1996). The peoples of Middle-earth. Houghton Mifflin Co..

Chicago Style (17th ed.) Citation

Tolkien, J. R. R., and Christopher Tolkien. The Peoples of Middle-earth. Boston: Houghton Mifflin Co., 1996.

MLA (9th ed.) Citation

Tolkien, J. R. R., and Christopher Tolkien. The Peoples of Middle-earth. Houghton Mifflin Co., 1996.