APA引文

Helgesen, M. (2007). Practical English language teaching: Listening. New York: McGraw-Hill.

Trích dẫn kiểu Chicago

Helgesen, Marc. Practical English Language Teaching: Listening. New York: McGraw-Hill, 2007.

MLA引文

Helgesen, Marc. Practical English Language Teaching: Listening. New York: McGraw-Hill, 2007.

警告：这些引文格式不一定是100％准确.