APA (7th ed.) Citation

Christie, A. (2011). Hallowe'en party: A Hercule Poirot mystery (First Harper paperback.). William Morrow, an imprint of HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Christie, Agatha. Hallowe'en Party: A Hercule Poirot Mystery. First Harper paperback. New York, NY: William Morrow, an imprint of HarperCollins Publishers, 2011.

MLA (8th ed.) Citation

Christie, Agatha. Hallowe'en Party: A Hercule Poirot Mystery. First Harper paperback. William Morrow, an imprint of HarperCollins Publishers, 2011.

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