Help me cite my sources properly

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Job Description

Hi, I've written a paper for my english class explaining the concept of Big Data. I need to turn in the paper by midnight EST on Friday 11/23/12. I'm not sure if I'm citing my sources properly.
I would like someone to read my essay and correct my citing errors and also give any editorial revision suggestions if you find any.

It needs to be cited in MLA format.

Skills: english