APA (7th ed.) Citation

Hardt, M., & Negri, A. (2005). Multitude: War and democracy in the age of Empire. Penguin Books.

Chicago Style (17th ed.) Citation

Hardt, Michael, and Antonio Negri. Multitude: War and Democracy in the Age of Empire. New York: Penguin Books, 2005.

MLA (9th ed.) Citation

Hardt, Michael, and Antonio Negri. Multitude: War and Democracy in the Age of Empire. Penguin Books, 2005.