(2000). Female Field Concentration Ratio Index of Doctor's Degrees Conferred. U.S. Department of Education.
芝加哥风格引文Female Field Concentration Ratio Index of Doctor's Degrees Conferred. U.S. Department of Education, 2000.
MLA引文Female Field Concentration Ratio Index of Doctor's Degrees Conferred. U.S. Department of Education, 2000.
警告：这些引文格式不一定是100％准确.