(1990). State of the world 1990, a world in watch institute report on progress toward a sustainable society. Unwin.
Style de citation Chicago (17e éd.)State of the World 1990, a World in Watch Institute Report on Progress Toward a Sustainable Society. Unwin, 1990.
Style de citation MLA (9e éd.)State of the World 1990, a World in Watch Institute Report on Progress Toward a Sustainable Society. Unwin, 1990.
Attention : ces citations peuvent ne pas être correctes à 100%.