APA (7th ed.) Citation

Darlton, C. (1974). Attack from the unseen (American ed.). Ace Books.

Chicago Style (17th ed.) Citation

Darlton, Clark. Attack from the Unseen. American ed. New York: Ace Books, 1974.

MLA (9th ed.) Citation

Darlton, Clark. Attack from the Unseen. American ed. Ace Books, 1974.