APA引文

Ur, P., & Penny Ur. (1981). Discussions that work: Task-centred fluency practice. Cambridge,New York: Cambridge University Press.

Trích dẫn kiểu Chicago

Ur, Penny, và Penny Ur. Discussions That Work: Task-centred Fluency Practice. Cambridge,New York: Cambridge University Press, 1981.

MLA引文

Ur, Penny, và Penny Ur. Discussions That Work: Task-centred Fluency Practice. Cambridge,New York: Cambridge University Press, 1981.

警告：這些引文格式不一定是100％准確.