APA

Brown Lester R,, . (1992). State of the world, 1992. New Delhi: World Watch Institute.

Chicago

Brown Lester R,, . 1992. State of the world, 1992. New Delhi: World Watch Institute.

Harvard

Brown Lester R,, . (1992). State of the world, 1992. New Delhi: World Watch Institute.

MLA

Brown Lester R,, . State of the world, 1992. New Delhi: World Watch Institute. 1992.