Brown, L. R. (1997). State of the world 1998: A world watch institute report on progress toward a sustainable society. W.W. Norton & Company.
Styl ChicagoBrown, Lester R. State of the World 1998: A World Watch Institute Report on Progress Toward a Sustainable Society. New York: W.W. Norton & Company, 1997.
Citace podle MLABrown, Lester R. State of the World 1998: A World Watch Institute Report on Progress Toward a Sustainable Society. W.W. Norton & Company, 1997.
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