APA (7th ed.) Citation

Foster, R. (1974). A guide to Middle Earth. Ballantine Books.

Chicago Style (17th ed.) Citation

Foster, Robert. A Guide to Middle Earth. N.Y.: Ballantine Books, 1974.

MLA (8th ed.) Citation

Foster, Robert. A Guide to Middle Earth. Ballantine Books, 1974.

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