Walker, E., & Elsworth, S. (2000). Grammar practice for upper intermediate students. England: Longman.
シカゴスタイル引用形Walker, Elaine., , Steve Elsworth. Grammar Practice for Upper Intermediate Students. England: Longman, 2000.
MLA引用形式Walker, Elaine., , Steve Elsworth. Grammar Practice for Upper Intermediate Students. England: Longman, 2000.
警告: この引用は必ずしも正確ではありません.