APA (7th ed.) Citation

Howard, R. E., & Drake, D. (1987). Cthulhu: The mythos and kindred horrors. Baen Books.

Chicago Style (17th ed.) Citation

Howard, Robert E., and David Drake. Cthulhu: The Mythos and Kindred Horrors. New York: Baen Books, 1987.

MLA (9th ed.) Citation

Howard, Robert E., and David Drake. Cthulhu: The Mythos and Kindred Horrors. Baen Books, 1987.