APA (7th ed.) Citation

Tolkien, C. (2002). The history of Middle-Earth index. HarperCollins.

Chicago Style (17th ed.) Citation

Tolkien, Christopher. The History of Middle-Earth Index. London: HarperCollins, 2002.

MLA (9th ed.) Citation

Tolkien, Christopher. The History of Middle-Earth Index. HarperCollins, 2002.

Warning: These citations may not always be 100% accurate.