APA (7th ed.) Citation

Van Vogt, A. E. (1951). The weapon shops of Isher. Ace Books.

Chicago Style (17th ed.) Citation

Van Vogt, A. E. The Weapon Shops of Isher. New York: Ace Books, 1951.

MLA (9th ed.) Citation

Van Vogt, A. E. The Weapon Shops of Isher. Ace Books, 1951.