Worldwatch Institute & Brown, L. R. (1993). State of the world, 1993: A Worldwatch Institute report on progress toward a sustainable society. Norton.
Citação do estilo Chicago (17ª ed.)Worldwatch Institute e Lester Russell Brown. State of the World, 1993: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: Norton, 1993.
Citação MLA (8ª ed.)Worldwatch Institute e Lester Russell Brown. State of the World, 1993: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton, 1993.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.