APA (7th ed.) Citation

Christopher, J. (1964). The world in winter. Penguin Books.

Chicago Style (17th ed.) Citation

Christopher, John. The World in Winter. Middlesex: Penguin Books, 1964.

MLA (9th ed.) Citation

Christopher, John. The World in Winter. Penguin Books, 1964.

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