Regents pub. co. (1977). The Blue book of business English. Regent Pub.
Chicagoスタイル(17版)引用形式Regents pub. co. The Blue Book of Business English. New york: Regent Pub, 1977.
MLA(9版)引用形式Regents pub. co. The Blue Book of Business English. Regent Pub, 1977.
警告: この引用は必ずしも正確ではありません.