APA (7th ed.) Citation

Offutt, A. J., & Howard, R. E. (1981). The sword of the Gael. Ace Books.

Chicago Style (17th ed.) Citation

Offutt, Andrew J., and Robert E. Howard. The Sword of the Gael. New York: Ace Books, 1981.

MLA (9th ed.) Citation

Offutt, Andrew J., and Robert E. Howard. The Sword of the Gael. Ace Books, 1981.