World Health Organization. (1993). Guidelines for drinking - water quality: Recommendations. World Health Organization.
Chicagoスタイル(17版)引用形式World Health Organization. Guidelines for Drinking - Water Quality: Recommendations. Geneva: World Health Organization, 1993.
MLA(8版)引用形式World Health Organization. Guidelines for Drinking - Water Quality: Recommendations. World Health Organization, 1993.
警告: この引用は必ずしも正確ではありません.