Weisman, A. (2007). The world without us. Thomas Dunne Books/St. Martin's Press.
Cita Chicago Style (17a ed.)Weisman, Alan. The World Without Us. New York: Thomas Dunne Books/St. Martin's Press, 2007.
Cita MLA (8a ed.)Weisman, Alan. The World Without Us. Thomas Dunne Books/St. Martin's Press, 2007.
Precaución: Estas citas no son 100% exactas.