APA (7th ed.) Citation

Bayard, P., & Cosman, C. (2001). Who killed Roger Ackroyd?: The mystery behind the Agatha Christie mystery (Paperback edition.). The New Press.

Chicago Style (17th ed.) Citation

Bayard, Pierre, and Carol Cosman. Who Killed Roger Ackroyd?: The Mystery Behind the Agatha Christie Mystery. Paperback edition. New York: The New Press, 2001.

MLA (9th ed.) Citation

Bayard, Pierre, and Carol Cosman. Who Killed Roger Ackroyd?: The Mystery Behind the Agatha Christie Mystery. Paperback edition. The New Press, 2001.

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