Guffey, M. E. (1995). Essentials of business communication (3rd ed.). South-Western College.
Chicagoスタイル(17版)引用形式Guffey, Mary Ellen. Essentials of Business Communication. 3rd ed. Cincinnati, Ohio: South-Western College, 1995.
MLA(9版)引用形式Guffey, Mary Ellen. Essentials of Business Communication. 3rd ed. South-Western College, 1995.
警告: この引用は必ずしも正確ではありません.