APA (7th ed.) Citation

Russell, E. F., Schulz, R., & Wollheim, D. A. (1954). Sentinels from space. Ace Books.

Chicago Style (17th ed.) Citation

Russell, Eric Frank, Robert Schulz, and Donald A. Wollheim. Sentinels from Space. New York: Ace Books, 1954.

MLA (9th ed.) Citation

Russell, Eric Frank, et al. Sentinels from Space. Ace Books, 1954.