APA (7th ed.) Citation

Van Vogt, A. E. (1972). The battle of forever: Science fiction. Sidgwick and Jackson.

Chicago Style (17th ed.) Citation

Van Vogt, A. E. The Battle of Forever: Science Fiction. London: Sidgwick and Jackson, 1972.

MLA (8th ed.) Citation

Van Vogt, A. E. The Battle of Forever: Science Fiction. Sidgwick and Jackson, 1972.

Warning: These citations may not always be 100% accurate.