APA (7th ed.) Citation

Christie, A. (1948). The Seven Dials Mystery. Penguin.

Chicago Style (17th ed.) Citation

Christie, Agatha. The Seven Dials Mystery. London: Penguin, 1948.

MLA (9th ed.) Citation

Christie, Agatha. The Seven Dials Mystery. Penguin, 1948.

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