(2000). Percentile Distribution of Writing Performance Scores: 1984-96. U.S. Department of Education.
芝加哥风格引文Percentile Distribution of Writing Performance Scores: 1984-96. U.S. Department of Education, 2000.
MLA引文Percentile Distribution of Writing Performance Scores: 1984-96. U.S. Department of Education, 2000.
警告：这些引文格式不一定是100％准确.