Simmons, I. G. (1996). Changing the face of the earth: Culture, environment, history (2nd ed.). Blackwell Publishers.
Cita Chicago Style (17a ed.)Simmons, Ian Gordon. Changing the Face of the Earth: Culture, Environment, History. 2nd ed. Oxford: Blackwell Publishers, 1996.
Cita MLA (9a ed.)Simmons, Ian Gordon. Changing the Face of the Earth: Culture, Environment, History. 2nd ed. Blackwell Publishers, 1996.
Precaución: Estas citas no son 100% exactas.