APA (7th ed.) Citation

Emmott, B. (2004). 20:21 vision: The lessons of the 20th century for the 21st. Penguin Books.

Chicago Style (17th ed.) Citation

Emmott, Bill. 20:21 Vision: The Lessons of the 20th Century for the 21st. New York: Penguin Books, 2004.

MLA (8th ed.) Citation

Emmott, Bill. 20:21 Vision: The Lessons of the 20th Century for the 21st. Penguin Books, 2004.