Ur, P. (1981). Discussions that work: Task-centred fluency practice. Univ. Pr.
Chicagoスタイル(17版)引用形式Ur, Penny. Discussions That Work: Task-centred Fluency Practice. Cambridge: Univ. Pr, 1981.
MLA(9版)引用形式Ur, Penny. Discussions That Work: Task-centred Fluency Practice. Univ. Pr, 1981.
警告: この引用は必ずしも正確ではありません.