UNICEF. (1990). Water quality assessment in terai tubewell project.
Chicagoスタイル(17版)引用形式UNICEF. Water Quality Assessment in Terai Tubewell Project. 1990.
MLA(8版)引用形式UNICEF. Water Quality Assessment in Terai Tubewell Project. 1990.
警告: この引用は必ずしも正確ではありません.