Cita APA (7a ed.)

Christie, A. (1984). The labors of Hercules: [Featuring Hercule Poirot]. Berkley.

Cita Chicago Style (17a ed.)

Christie, Agatha. The Labors of Hercules: [Featuring Hercule Poirot]. New York, Estados Unidos: Berkley, 1984.

Cita MLA (8a ed.)

Christie, Agatha. The Labors of Hercules: [Featuring Hercule Poirot]. Berkley, 1984.