NATU, V. G. (1977). BUSINESS COMMUNICATION. VIPUL PRAKASHAN.
Lua i Stíl Chicago (17ú heag.)NATU, V. G. BUSINESS COMMUNICATION. BOMBAY: VIPUL PRAKASHAN, 1977.
Lua MLA (9ú heag.)NATU, V. G. BUSINESS COMMUNICATION. VIPUL PRAKASHAN, 1977.
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