Chambers, W. B., & Sampson, G. P. (2002). Trade, environment, and the millennium (2nd ed.). Estados Unidos de America: United Nations University Press.
Cita MLA (8 ed.) (Copiar al portapapeles)Chambers, W. Bradnee,, and Gary P. Sampson. Trade, Environment, and the Millennium. 2nd ed. Estados Unidos de America: United Nations University Press , 2002.