Christie, A. <. (1968). At Bertram's Hotel = Bertram's Hotel <engl.>: Agatha Christie. Fontana.
Chicagoスタイル(17版)引用形式Christie, Agatha <1890-1976>. At Bertram's Hotel = Bertram's Hotel <engl.>: Agatha Christie. London: Fontana, 1968.
MLA(8版)引用形式Christie, Agatha <1890-1976>. At Bertram's Hotel = Bertram's Hotel <engl.>: Agatha Christie. Fontana, 1968.
警告: この引用は必ずしも正確ではありません.