APA (7th ed.) Citation

Van Vogt, A. E. (1977). The players of Null-A. Gregg Press.

Chicago Style (17th ed.) Citation

Van Vogt, A. E. The Players of Null-A. Boston: Gregg Press, 1977.

MLA (9th ed.) Citation

Van Vogt, A. E. The Players of Null-A. Gregg Press, 1977.