Christie, A. (1986). Three act tragedy: A Hercule Poirot Mystery. Dodd, Mead.
Cita Chicago Style (17a ed.)Christie, Agatha. Three Act Tragedy: A Hercule Poirot Mystery. New York: Dodd, Mead, 1986.
Cita MLA (8a ed.)Christie, Agatha. Three Act Tragedy: A Hercule Poirot Mystery. Dodd, Mead, 1986.
Precaución: Estas citas no son 100% exactas.