APA (7th ed.) Citation

Fagan, B. M. (2004). The long summer: How climate changed civilization. Basic Books.

Chicago Style (17th ed.) Citation

Fagan, Brian M. The Long Summer: How Climate Changed Civilization. New York: Basic Books, 2004.

MLA (9th ed.) Citation

Fagan, Brian M. The Long Summer: How Climate Changed Civilization. Basic Books, 2004.