UNICEF. (1990). Water quality assessment in terai tubewell project.
芝加哥风格引文UNICEF. Water Quality Assessment in Terai Tubewell Project. 1990.
MLA引文UNICEF. Water Quality Assessment in Terai Tubewell Project. 1990.
警告：这些引文格式不一定是100％准确.
APA引文