APA (7th ed.) Citation

Christie, A. (1965). The thirteen problems. Fontana.

Chicago Style (17th ed.) Citation

Christie, Agatha. The Thirteen Problems. London: Fontana, 1965.

MLA (8th ed.) Citation

Christie, Agatha. The Thirteen Problems. Fontana, 1965.

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