APA (7th ed.) Citation

Halliday. (2002). Two hours that shook the world: September 11, 2001: Causes and consequences. Saqi Books.

Chicago Style (17th ed.) Citation

Halliday. Two Hours That Shook the World: September 11, 2001: Causes and Consequences. London: Saqi Books, 2002.

MLA (8th ed.) Citation

Halliday. Two Hours That Shook the World: September 11, 2001: Causes and Consequences. Saqi Books, 2002.

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