APA

United Nations Conference on Environment and Development, U.S. Citizens Network on the United Nations Conference on Environmen t and Development, . (1991). Earth Summit, 1992, Rio de Janeiro, Brazil. San Francisco, Calif: U.S. Citizens Network on the United Natio ns Conference on Environment and Development.

Chicago

United Nations Conference on Environment and Development, U.S. Citizens Network on the United Nations Conference on Environmen t and Development, . 1991. Earth Summit, 1992, Rio de Janeiro, Brazil. San Francisco, Calif: U.S. Citizens Network on the United Natio ns Conference on Environment and Development.

Harvard

United Nations Conference on Environment and Development, U.S. Citizens Network on the United Nations Conference on Environmen t and Development, . (1991). Earth Summit, 1992, Rio de Janeiro, Brazil. San Francisco, Calif: U.S. Citizens Network on the United Natio ns Conference on Environment and Development.

MLA

United Nations Conference on Environment and Development, U.S. Citizens Network on the United Nations Conference on Environmen t and Development, . Earth Summit, 1992, Rio de Janeiro, Brazil. San Francisco, Calif: U.S. Citizens Network on the United Natio ns Conference on Environment and Development. 1991.