Ur, P. (1992). Discussions that work task centred fluency practice. New York: Cambridge university press.
シカゴスタイル引用形Ur, Penny. Discussions That Work Task Centred Fluency Practice. New York: Cambridge university press, 1992.
MLA引用形式Ur, Penny. Discussions That Work Task Centred Fluency Practice. New York: Cambridge university press, 1992.
警告: この引用は必ずしも正確ではありません.