APA (7th ed.) Citation

Agatha, C. (1972). Elephants can remember: Hercule poirot novel. Berkley books.

Chicago Style (17th ed.) Citation

Agatha, Christie. Elephants Can Remember: Hercule Poirot Novel. New York: Berkley books, 1972.

MLA (9th ed.) Citation

Agatha, Christie. Elephants Can Remember: Hercule Poirot Novel. Berkley books, 1972.