APA引文

Ur, P. A course in language teaching. Practice and theory (3a ed.).

芝加哥风格引文

Ur, Penny. A Course in Language Teaching. Practice and Theory. 3a ed.

MLA引文

Ur, Penny. A Course in Language Teaching. Practice and Theory. 3a ed.

警告：这些引文格式不一定是100％准确.