Ellen Guffey, M. (2006). Business communicationProcess productMary Ellen Guffey, Kathleen Rhodes dan Patricia Rogin. Salemba Empat.
Chicago Style (17th ed.) CitationEllen Guffey, Mary. Business CommunicationProcess ProductMary Ellen Guffey, Kathleen Rhodes Dan Patricia Rogin. Salemba Empat, 2006.
MLA引文Ellen Guffey, Mary. Business CommunicationProcess ProductMary Ellen Guffey, Kathleen Rhodes Dan Patricia Rogin. Salemba Empat, 2006.
警告:這些引文格式不一定是100%准確.