APA (7th ed.) Citation

1920-2010 Francis, D., & Francis, F. (2012). Gamble: A Dick Francis novel. Penguin Books.

Chicago Style (17th ed.) Citation

1920-2010 Francis, Dick, and Felix Francis. Gamble: A Dick Francis Novel. London: Penguin Books, 2012.

MLA (8th ed.) Citation

1920-2010 Francis, Dick, and Felix Francis. Gamble: A Dick Francis Novel. Penguin Books, 2012.