(2000). Calculation of National Index of Public Effort to Fund Education. U.S. Department of Education.
芝加哥风格引文Calculation of National Index of Public Effort to Fund Education. U.S. Department of Education, 2000.
MLA引文Calculation of National Index of Public Effort to Fund Education. U.S. Department of Education, 2000.
警告：这些引文格式不一定是100％准确.