DAVIDSON ELEANOR. (2004). FORMATTING LETTERS AND REPORTS: COMPUTER USER'S GUIDE. VIVA BOOKS PVT.LTD.
Lua i Stíl Chicago (17ú heag.)DAVIDSON ELEANOR. FORMATTING LETTERS AND REPORTS: COMPUTER USER'S GUIDE. NEW DELHI: VIVA BOOKS PVT.LTD, 2004.
Lua MLA (9ú heag.)DAVIDSON ELEANOR. FORMATTING LETTERS AND REPORTS: COMPUTER USER'S GUIDE. VIVA BOOKS PVT.LTD, 2004.
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