Não informado. (1990). Science watch. Institute for Scientific Information.
Chicagoスタイル(17版)引用形式Não informado. Science Watch. Philadelphia, Pa: Institute for Scientific Information, 1990.
MLA(8版)引用形式Não informado. Science Watch. Institute for Scientific Information, 1990.
警告: この引用は必ずしも正確ではありません.