WONG, F. (2009). SAP COMPREHENION FAST FORWARD WORKBOOK- 2.
芝加哥风格引文WONG, FELICIA. SAP COMPREHENION FAST FORWARD WORKBOOK- 2. 2009.
MLA引文WONG, FELICIA. SAP COMPREHENION FAST FORWARD WORKBOOK- 2. 2009.
警告：这些引文格式不一定是100％准确.
APA引文