APA (7th ed.) Citation

Christie, A. (1972). Passenger to Frankfurt: An extravaganza (Pocket Book edition.). Pocket Books.

Chicago Style (17th ed.) Citation

Christie, Agatha. Passenger to Frankfurt: An Extravaganza. Pocket Book edition. New York: Pocket Books, 1972.

MLA (9th ed.) Citation

Christie, Agatha. Passenger to Frankfurt: An Extravaganza. Pocket Book edition. Pocket Books, 1972.

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