UNESCO. (1974). Social indicators: Problemsof definition and of selection. Unesco.
シカゴスタイル引用形UNESCO. Social Indicators: Problemsof Definition and of Selection. Paries: Unesco, 1974.
MLA引用形式UNESCO. Social Indicators: Problemsof Definition and of Selection. Unesco, 1974.
警告: この引用は必ずしも正確ではありません.