(2003). Listening carefully.
Trích dẫn kiểu ChicagoListening Carefully. 2003.
MLA引文Listening Carefully. 2003.
警告：這些引文格式不一定是100％准確.
APA引文
(2003). Listening carefully.
Trích dẫn kiểu ChicagoListening Carefully. 2003.
MLA引文Listening Carefully. 2003.