APA (7th ed.) Citation

Heatley. (2010). 100 greatest events that changed the world. Igloo Books.

Chicago Style (17th ed.) Citation

Heatley. 100 Greatest Events That Changed the World. United Kingdom: Igloo Books, 2010.

MLA (8th ed.) Citation

Heatley. 100 Greatest Events That Changed the World. Igloo Books, 2010.

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