(2000). Trends in the Reading Performance of 9-, 13-, & 17-year-olds. U.S. Department of Education.
芝加哥风格引文Trends in the Reading Performance of 9-, 13-, & 17-year-olds. U.S. Department of Education, 2000.
MLA引文Trends in the Reading Performance of 9-, 13-, & 17-year-olds. U.S. Department of Education, 2000.
警告：这些引文格式不一定是100％准确.