APA

Brown Lester R,, . (1989). State of the world 1988 : A world wide institute report on progress toward a sustainable society. New Delhi: Prentice Hall of India.

Chicago

Brown Lester R,, . 1989. State of the world 1988 : A world wide institute report on progress toward a sustainable society. New Delhi: Prentice Hall of India.

Harvard

Brown Lester R,, . (1989). State of the world 1988 : A world wide institute report on progress toward a sustainable society. New Delhi: Prentice Hall of India.

MLA

Brown Lester R,, . State of the world 1988 : A world wide institute report on progress toward a sustainable society. New Delhi: Prentice Hall of India. 1989.