Cita APA (7a ed.)

Christie, A. (1976). Hercule Poirot's Christmas (12 Impr.). Fontana/Collins.

Cita Chicago Style (17a ed.)

Christie, Agatha. Hercule Poirot's Christmas. 12 Impr. Glasgow: Fontana/Collins, 1976.

Cita MLA (9a ed.)

Christie, Agatha. Hercule Poirot's Christmas. 12 Impr. Fontana/Collins, 1976.