Cita APA (7th ed.)

Christie, A. <. (1968). At Bertram's Hotel = Bertram's Hotel <engl.>: Agatha Christie. Fontana.

Cita Chicago (17th ed.)

Christie, Agatha <1890-1976>. At Bertram's Hotel = Bertram's Hotel <engl.>: Agatha Christie. London: Fontana, 1968.

Cita MLA (8th ed.)

Christie, Agatha <1890-1976>. At Bertram's Hotel = Bertram's Hotel <engl.>: Agatha Christie. Fontana, 1968.