(2007). Aligning Science Standards: Arkansas & the 2009 National Assessment of Educational Progress. Regional Educational Laboratory Program.
芝加哥风格引文Aligning Science Standards: Arkansas & the 2009 National Assessment of Educational Progress. Regional Educational Laboratory Program, 2007.
MLA引文Aligning Science Standards: Arkansas & the 2009 National Assessment of Educational Progress. Regional Educational Laboratory Program, 2007.
警告：这些引文格式不一定是100％准确.