Percentage of Students With Disabilities Ages 6-21: 1986-96. US Department of Education.
芝加哥风格引文Percentage of Students With Disabilities Ages 6-21: 1986-96. US Department of Education.
MLA引文Percentage of Students With Disabilities Ages 6-21: 1986-96. US Department of Education.
警告：这些引文格式不一定是100％准确.