LESIKAR, R. V. (1993). Basic Business Communication Raymond V Lesikar, John D. Pettit And Marie E Flatley. Richard D. Irwin.
Lua i Stíl Chicago (17ú heag.)LESIKAR, Raymond V. Basic Business Communication Raymond V Lesikar, John D. Pettit And Marie E Flatley. Richard D. Irwin, 1993.
Lua MLA (8ú heag.)LESIKAR, Raymond V. Basic Business Communication Raymond V Lesikar, John D. Pettit And Marie E Flatley. Richard D. Irwin, 1993.
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