CARRASCO,EFFIE. (2005). UNDERSTANDING GRAMMAR RULES AND PRACTICE 2.
芝加哥风格引文CARRASCO,EFFIE. UNDERSTANDING GRAMMAR RULES AND PRACTICE 2. 2005.
MLA引文CARRASCO,EFFIE. UNDERSTANDING GRAMMAR RULES AND PRACTICE 2. 2005.
警告：这些引文格式不一定是100％准确.
APA引文