APA (7th ed.) Citation

Baxter & Downing. (2001). The day that shook the world: Understanding September 11th.

Chicago Style (17th ed.) Citation

Baxter and Downing. The Day That Shook the World: Understanding September 11th. LondonlbBBC Worldwide ltd, 2001.

MLA (9th ed.) Citation

Baxter and Downing. The Day That Shook the World: Understanding September 11th. 2001.

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