APA (7th ed.) Citation

Christie, A. (2001). N or m? (Agatha Christie signature ed.). HarperCollins.

Chicago Style (17th ed.) Citation

Christie, Agatha. N or M? Agatha Christie signature ed. London: HarperCollins, 2001.

MLA (9th ed.) Citation

Christie, Agatha. N or M? Agatha Christie signature ed. HarperCollins, 2001.

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