Não informado. (1971). Euro abstracts. Commission of the European Communities.
Chicagoスタイル(17版)引用形式Não informado. Euro Abstracts. Luxembourg: Commission of the European Communities, 1971.
MLA(8版)引用形式Não informado. Euro Abstracts. Commission of the European Communities, 1971.
警告: この引用は必ずしも正確ではありません.