HIMSTREET, W. C. (1975). Business English in communication. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)HIMSTREET, William C. Business English in Communication. Prentice Hall, 1975.
Lua MLA (8ú heag.)HIMSTREET, William C. Business English in Communication. Prentice Hall, 1975.
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