APA (7th ed.) Citation

Brunner, J., & Van Vogt, A. E. (1959). The world swappers. Ace Books.

Chicago Style (17th ed.) Citation

Brunner, John, and A. E. Van Vogt. The World Swappers. New York, N.Y.: Ace Books, 1959.

MLA (9th ed.) Citation

Brunner, John, and A. E. Van Vogt. The World Swappers. Ace Books, 1959.