Marc Helgesen. (1996). Active listening expanding - students'book 3: Expanding understanding through content. Cambridge, UK: Cambridge university press.
Trích dẫn kiểu ChicagoMarc Helgesen. Active Listening Expanding - Students'book 3: Expanding Understanding Through Content. Cambridge, UK: Cambridge university press, 1996.
MLA引文Marc Helgesen. Active Listening Expanding - Students'book 3: Expanding Understanding Through Content. Cambridge, UK: Cambridge university press, 1996.
警告：这些引文格式不一定是100％准确.