APA (7th ed.) Citation

Klingaman, W. K., & Klingaman, N. P. (2013). The year without summer: 1816 and the volcano that darkened the world and changed history. St. Martin's Press.

Chicago Style (17th ed.) Citation

Klingaman, William K., and Nicholas P. Klingaman. The Year Without Summer: 1816 and the Volcano That Darkened the World and Changed History. New York: St. Martin's Press, 2013.

MLA (9th ed.) Citation

Klingaman, William K., and Nicholas P. Klingaman. The Year Without Summer: 1816 and the Volcano That Darkened the World and Changed History. St. Martin's Press, 2013.