BARR, D. W. (1980). Communication For Business, Professional, And Technical Students Professional , And Technical Students Doris W. Barr. Wadsworth Publishing Company.
Lua i Stíl Chicago (17ú heag.)BARR, Doris W. Communication For Business, Professional, And Technical Students Professional , And Technical Students Doris W. Barr. Wadsworth Publishing Company, 1980.
Lua MLA (8ú heag.)BARR, Doris W. Communication For Business, Professional, And Technical Students Professional , And Technical Students Doris W. Barr. Wadsworth Publishing Company, 1980.
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