APA (7th ed.) Citation

Skousen, W. C. (2006). The 5000 year leap: The 28 great ideas that changed the world. National Center for Constitutional Studies.

Chicago Style (17th ed.) Citation

Skousen, W. Cleon. The 5000 Year Leap: The 28 Great Ideas That Changed the World. [Washington, D.C.]: National Center for Constitutional Studies, 2006.

MLA (9th ed.) Citation

Skousen, W. Cleon. The 5000 Year Leap: The 28 Great Ideas That Changed the World. National Center for Constitutional Studies, 2006.