APA

Brown Lester R, Flavin Christopher, . (1998). State of the world: A worldwatch institute report on progress toward a sustainable soceity. New York: W. W. Norton & Company.

Chicago

Brown Lester R, Flavin Christopher, . 1998. State of the world: A worldwatch institute report on progress toward a sustainable soceity. New York: W. W. Norton & Company.

Harvard

Brown Lester R, Flavin Christopher, . (1998). State of the world: A worldwatch institute report on progress toward a sustainable soceity. New York: W. W. Norton & Company.

MLA

Brown Lester R, Flavin Christopher, . State of the world: A worldwatch institute report on progress toward a sustainable soceity. New York: W. W. Norton & Company. 1998.