Clarke, D., & Macfarlane, M. (2007). Focus on Business Workbook (New edition.). Cornelsen.
Chicagoスタイル(17版)引用形式Clarke, David, , Michael Macfarlane. Focus on Business Workbook. New edition. Berlin: Cornelsen, 2007.
MLA(8版)引用形式Clarke, David, , Michael Macfarlane. Focus on Business Workbook. New edition. Cornelsen, 2007.
警告: この引用は必ずしも正確ではありません.