Butterfield, J. (2010). Verbal communication: Illustrated course guides (Second edition.). Course Technology, Cengage Learning.
Chicagoスタイル(17版)引用形式Butterfield, Jeff. Verbal Communication: Illustrated Course Guides. Second edition. Australia: Course Technology, Cengage Learning, 2010.
MLA(9版)引用形式Butterfield, Jeff. Verbal Communication: Illustrated Course Guides. Second edition. Course Technology, Cengage Learning, 2010.
警告: この引用は必ずしも正確ではありません.