APA (7th ed.) Citation

Coulson, J., & Tubb, E. C. (1967). Crisis on Cheiron. Ace Books.

Chicago Style (17th ed.) Citation

Coulson, Juanita, and E. C. Tubb. Crisis on Cheiron. New York: Ace Books, 1967.

MLA (9th ed.) Citation

Coulson, Juanita, and E. C. Tubb. Crisis on Cheiron. Ace Books, 1967.