(1993). Business English certificate: A guide to the business English certificate. England: University of Cambridge.
シカゴスタイル引用形Business English Certificate: A Guide to the Business English Certificate. England: University of Cambridge, 1993.
MLA引用形式Business English Certificate: A Guide to the Business English Certificate. England: University of Cambridge, 1993.
警告: この引用は必ずしも正確ではありません.