Lesikar Raymond. (2015). Business Communication: Connecting in a digital World (13.). McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Lesikar Raymond. Business Communication: Connecting in a Digital World. 13. McGraw Hill, 2015.
Lua MLA (9ú heag.)Lesikar Raymond. Business Communication: Connecting in a Digital World. 13. McGraw Hill, 2015.
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