Nunan, D. (2001). Expressions 3. Australia: Thomson/Heinle.
Trích dẫn kiểu ChicagoNunan, David. Expressions 3. Australia: Thomson/Heinle, 2001.
MLA引文Nunan, David. Expressions 3. Australia: Thomson/Heinle, 2001.
警告：这些引文格式不一定是100％准确.
APA引文