Ulrich-Fuller, L. (2011). Picture yourself learning Microsoft Excel 2010. Course Technology PTR.
芝加哥风格引文Ulrich-Fuller, Laurie. Picture Yourself Learning Microsoft Excel 2010. Boston, Mass., U.S.A.: Course Technology PTR, 2011.
MLA引文Ulrich-Fuller, Laurie. Picture Yourself Learning Microsoft Excel 2010. Course Technology PTR, 2011.
警告：这些引文格式不一定是100％准确.