Não informado. (1974). Information News and Sources. Science Associates International.
Chicagoスタイル(17版)引用形式Não informado. Information News and Sources. New York: Science Associates International, 1974.
MLA(8版)引用形式Não informado. Information News and Sources. Science Associates International, 1974.
警告: この引用は必ずしも正確ではありません.