Não informado. (1971). Environment information access. Environmental Information Center of Ecology Forum.
Chicagoスタイル(17版)引用形式Não informado. Environment Information Access. New York: Environmental Information Center of Ecology Forum, 1971.
MLA(8版)引用形式Não informado. Environment Information Access. Environmental Information Center of Ecology Forum, 1971.
警告: この引用は必ずしも正確ではありません.