John Soars. (1987). Headway: Intermediate workbook. London: Oxford Univ. Press.
シカゴスタイル引用形John Soars. Headway: Intermediate Workbook. London: Oxford Univ. Press, 1987.
MLA引用形式John Soars. Headway: Intermediate Workbook. London: Oxford Univ. Press, 1987.
警告: この引用は必ずしも正確ではありません.