ALLEN, R. (2014). ACTIVE GRAMMAR PRACTICE BOOK- 7. SCHOLASTIC.
芝加哥风格引文ALLEN, ROSEMARY. ACTIVE GRAMMAR PRACTICE BOOK- 7. SCHOLASTIC, 2014.
MLA引文ALLEN, ROSEMARY. ACTIVE GRAMMAR PRACTICE BOOK- 7. SCHOLASTIC, 2014.
警告：这些引文格式不一定是100％准确.
APA引文