Ur, P. (1988). Grammar practice activities: A practical guide for teacher. Britain: Cambridge University Press.
シカゴスタイル引用形Ur, Penny. Grammar Practice Activities: A Practical Guide for Teacher. Britain: Cambridge University Press, 1988.
MLA引用形式Ur, Penny. Grammar Practice Activities: A Practical Guide for Teacher. Britain: Cambridge University Press, 1988.
警告: この引用は必ずしも正確ではありません.