Ryan, C. (2014). Manhattan Prep: Geometry:GMAT Strategy guide 4. MG Prep Inc.
芝加哥风格引文Ryan, Chris. Manhattan Prep: Geometry:GMAT Strategy Guide 4. Manhattan: MG Prep Inc, 2014.
MLA引文Ryan, Chris. Manhattan Prep: Geometry:GMAT Strategy Guide 4. MG Prep Inc, 2014.
警告：这些引文格式不一定是100％准确.