APA (7th ed.) Citation

Williams, H. (2006). Days that changed the world: The 50 defining events of world history. Quercus Publishers.

Chicago Style (17th ed.) Citation

Williams, Hywel. Days That Changed the World: The 50 Defining Events of World History. London: Quercus Publishers, 2006.

MLA (9th ed.) Citation

Williams, Hywel. Days That Changed the World: The 50 Defining Events of World History. Quercus Publishers, 2006.