MURPHY HERTA A. (1980). EFFECTIVE BUSINESS COMMUNICATION (3RD.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Lua i Stíl Chicago (17ú heag.)MURPHY HERTA A. EFFECTIVE BUSINESS COMMUNICATION. 3RD. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1980.
Lua MLA (9ú heag.)MURPHY HERTA A. EFFECTIVE BUSINESS COMMUNICATION. 3RD. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1980.
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