Locker, K. O. (2007). Business Communication (3rd.). Mcgraw Hill.
Lua i Stíl Chicago (17ú heag.)Locker, Kitty O. Business Communication. 3rd. New Delhi: Mcgraw Hill, 2007.
Lua MLA (9ú heag.)Locker, Kitty O. Business Communication. 3rd. Mcgraw Hill, 2007.
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