LESIKAR RAYMOND V. (2005). BASIC BUSINESS COMMUNICATION (10TH.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Lua i Stíl Chicago (17ú heag.)LESIKAR RAYMOND V. BASIC BUSINESS COMMUNICATION. 10TH. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2005.
Lua MLA (9ú heag.)LESIKAR RAYMOND V. BASIC BUSINESS COMMUNICATION. 10TH. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2005.
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