DR RAM, U. /. H. (2015). COLLINS EXPLORING GRAMMAR- 2. COLLINS.
芝加哥风格引文DR RAM, USHA / HANDS. COLLINS EXPLORING GRAMMAR- 2. COLLINS, 2015.
MLA引文DR RAM, USHA / HANDS. COLLINS EXPLORING GRAMMAR- 2. COLLINS, 2015.
警告：这些引文格式不一定是100％准确.
APA引文