APA (7th ed.) Citation

Christie,Agatha. (2007). The secret adversary. HarperCollins.

Chicago Style (17th ed.) Citation

Christie,Agatha. The Secret Adversary. London: HarperCollins, 2007.

MLA (9th ed.) Citation

Christie,Agatha. The Secret Adversary. HarperCollins, 2007.

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