APA (7th ed.) Citation

Clarke, A. C. (1981). Childhood's end (1st Ballantine Books trade ed.). Ballantine Books.

Chicago Style (17th ed.) Citation

Clarke, Arthur C. Childhood's End. 1st Ballantine Books trade ed. New York: Ballantine Books, 1981.

MLA (9th ed.) Citation

Clarke, Arthur C. Childhood's End. 1st Ballantine Books trade ed. Ballantine Books, 1981.