Lawrence, N. R. (1982). Writing communications in business and industry. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Lawrence, Nelda R. Writing Communications in Business and Industry. Englewood Cliffs, N.J: Prentice-Hall, 1982.
Lua MLA (9ú heag.)Lawrence, Nelda R. Writing Communications in Business and Industry. Prentice-Hall, 1982.
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