(1999). State of the world 1999: A worldwatch Institute report on progress toward a sustainable society. New York: Norton.
Style de citation ChicagoState of the World 1999: A Worldwatch Institute Report On Progress Toward a Sustainable Society. New York: Norton, 1999.
Style de citation MLAState of the World 1999: A Worldwatch Institute Report On Progress Toward a Sustainable Society. New York: Norton, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.