APA (7th ed.) Citation

Best, A., & Best, A. . .. (2004). International history of the twentieth century. Routledge.

Chicago Style (17th ed.) Citation

Best, Antony, and Antony Best. International History of the Twentieth Century. London: Routledge, 2004.

MLA (9th ed.) Citation

Best, Antony, and Antony Best. International History of the Twentieth Century. Routledge, 2004.