Ur, P. (1989). Grammar practice activities: A practical guide for teachers. Univ. Pr.
Chicagoスタイル(17版)引用形式Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Cambridge: Univ. Pr, 1989.
MLA(9版)引用形式Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. Univ. Pr, 1989.
警告: この引用は必ずしも正確ではありません.