Ober, S. (2006). Contemporary business communication (6th ed., instructor's annotated ed.). Houghton Mifflin Co.
Citace podle Chicago (17th ed.)Ober, Scot. Contemporary Business Communication. 6th ed., instructor's annotated ed. Boston, MA: Houghton Mifflin Co, 2006.
Citace podle MLA (9th ed.)Ober, Scot. Contemporary Business Communication. 6th ed., instructor's annotated ed. Houghton Mifflin Co, 2006.
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