APA (7th ed.) Citation

Zelazny, R. (1967). Four for tomorrow. Ace Books.

Chicago Style (17th ed.) Citation

Zelazny, Roger. Four for Tomorrow. New York: Ace Books, 1967.

MLA (9th ed.) Citation

Zelazny, Roger. Four for Tomorrow. Ace Books, 1967.

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