Dwyer, J. (2000). The business communication handbook ed.5. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Dwyer, Judith. The Business Communication Handbook Ed.5. Prentice Hall, 2000.
Lua MLA (8ú heag.)Dwyer, Judith. The Business Communication Handbook Ed.5. Prentice Hall, 2000.
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