Percentage of 25- to 29-year-old High School Completers with Some College. US Department of Education.
芝加哥风格引文Percentage of 25- to 29-year-old High School Completers with Some College. US Department of Education.
MLA引文Percentage of 25- to 29-year-old High School Completers with Some College. US Department of Education.
警告：这些引文格式不一定是100％准确.