APA (7th ed.) Citation

Christie, A. (1983). Why didn't they ask Evans? Bantam Books.

Chicago Style (17th ed.) Citation

Christie, Agatha. Why Didn't They Ask Evans? Toronto ; New York: Bantam Books, 1983.

MLA (8th ed.) Citation

Christie, Agatha. Why Didn't They Ask Evans? Bantam Books, 1983.

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