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WILLIAMS, BRIAN K., SAWYER, STACEYC.. (2011). USING INFORMATION TECHNOLOGY : A Practical Introduction to Computers & Communications (NINTH EDITION). NEW YORK: MGraw Hill.

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WILLIAMS, BRIAN K., SAWYER, STACEYC.. USING INFORMATION TECHNOLOGY : A Practical Introduction to Computers & Communications. NINTH EDITION NEW YORK: MGraw Hill, 2011. Text.

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WILLIAMS, BRIAN K., SAWYER, STACEYC.. USING INFORMATION TECHNOLOGY : A Practical Introduction to Computers & Communications. NINTH EDITION NEW YORK: MGraw Hill, 2011. Text.

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WILLIAMS, BRIAN K., SAWYER, STACEYC.. USING INFORMATION TECHNOLOGY : A Practical Introduction to Computers & Communications. NINTH EDITION NEW YORK: MGraw Hill, 2011. Print.