Hughes, J. (2005). Business focus: Elementary workbook. Oxford: Oxford University.
シカゴスタイル引用形Hughes, John. Business Focus: Elementary Workbook. Oxford: Oxford University, 2005.
MLA引用形式Hughes, John. Business Focus: Elementary Workbook. Oxford: Oxford University, 2005.
警告: この引用は必ずしも正確ではありません.