APA (7th ed.) Citation

Rackham, J., & High, P. E. (1967). The double invaders. Ace Books.

Chicago Style (17th ed.) Citation

Rackham, John, and Philip E. High. The Double Invaders. New York: Ace Books, 1967.

MLA (9th ed.) Citation

Rackham, John, and Philip E. High. The Double Invaders. Ace Books, 1967.