APA (7e ed.) Bronvermelding

Smith, L. C. (2010). The world in 2050: Four forces shaping civilization's northern future. Dutton, Penguin Group USA.

Chicago (17e ed.) Bronvermelding

Smith, Laurence C. The World in 2050: Four Forces Shaping Civilization's Northern Future. New York: Dutton, Penguin Group USA, 2010.

MLA (9e ed.) Bronvermelding

Smith, Laurence C. The World in 2050: Four Forces Shaping Civilization's Northern Future. Dutton, Penguin Group USA, 2010.