Microsoft. (1987). Microsoft Excel user's guide 1: Spreadsheet with business graphics and database. Microsoft Corporation.
Chicago Style aipamenaMicrosoft. Microsoft Excel User's Guide 1: Spreadsheet with Business Graphics and Database. [Redmond, Wash.]: Microsoft Corporation, 1987.
MLA aipamenaMicrosoft. Microsoft Excel User's Guide 1: Spreadsheet with Business Graphics and Database. Microsoft Corporation, 1987.
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