Graves Cummings, M. (1992). Listen, speak, present: A step by step : presenter's workbook. México: Thomson.
Chicago Style CitationGraves Cummings, Martha. Listen, Speak, Present: A Step By Step : Presenter's Workbook. México: Thomson, 1992.
MLA CitationGraves Cummings, Martha. Listen, Speak, Present: A Step By Step : Presenter's Workbook. México: Thomson, 1992.
Warning: These citations may not always be 100% accurate.