DAVIS, K. (1983). Better Business Writing: A Process Approach Ken Davis. Charles E. Merrill Publishing.
Lua i Stíl Chicago (17ú heag.)DAVIS, Ken. Better Business Writing: A Process Approach Ken Davis. Charles E. Merrill Publishing, 1983.
Lua MLA (8ú heag.)DAVIS, Ken. Better Business Writing: A Process Approach Ken Davis. Charles E. Merrill Publishing, 1983.
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