APA (7th ed.) Citation

Christie, A. (1971). Agatha Christie crime collection: Hallowe'en Party, Passenger to Frankfurt, The thirteen problems. Hamlyn.

Chicago Style (17th ed.) Citation

Christie, Agatha. Agatha Christie Crime Collection: Hallowe'en Party, Passenger to Frankfurt, The Thirteen Problems. London: Hamlyn, 1971.

MLA (8th ed.) Citation

Christie, Agatha. Agatha Christie Crime Collection: Hallowe'en Party, Passenger to Frankfurt, The Thirteen Problems. Hamlyn, 1971.

Warning: These citations may not always be 100% accurate.