(2003). State of the world, 2003: A Worldwatch Institute report on progress toward a sustainable society (20th .ed.). Earthscan.
Chicago-Zitierstil (17. Ausg.)State of the World, 2003: A Worldwatch Institute Report on Progress Toward a Sustainable Society. 20th .ed. London: Earthscan, 2003.
MLA-Zitierstil (9. Ausg.)State of the World, 2003: A Worldwatch Institute Report on Progress Toward a Sustainable Society. 20th .ed. Earthscan, 2003.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.