APA (7th ed.) Citation

Helms, R. (1974). Tolkien's world. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Helms, Randel. Tolkien's World. Boston: Houghton Mifflin, 1974.

MLA (8th ed.) Citation

Helms, Randel. Tolkien's World. Houghton Mifflin, 1974.