Cita APA

(2003). State of the world 2003: A worldwatch institute report on progress towards a sustainable society (20th ed.). Earthscan.

Chicago Edition Citation

State of the World 2003: A Worldwatch Institute Report on Progress Towards a Sustainable Society. 20th ed. London: Earthscan, 2003.

Cita MLA

State of the World 2003: A Worldwatch Institute Report on Progress Towards a Sustainable Society. 20th ed. Earthscan, 2003.