Becker, D., & Becker, P. B. (1993). Speaking skills for business careers. McGraw-Hill.
Chicagoスタイル(17版)引用形式Becker, Dennis, , Paula Borkum Becker. Speaking Skills for Business Careers. New York: McGraw-Hill, 1993.
MLA(9版)引用形式Becker, Dennis, , Paula Borkum Becker. Speaking Skills for Business Careers. McGraw-Hill, 1993.
警告: この引用は必ずしも正確ではありません.