Não informado. (1981). Environmental Education and Information. University of Salford.
Chicagoスタイル(17版)引用形式Não informado. Environmental Education and Information. Salford, Inglaterra: University of Salford, 1981.
MLA(8版)引用形式Não informado. Environmental Education and Information. University of Salford, 1981.
警告: この引用は必ずしも正確ではありません.