Reference Library Jquery

Hello to all,
I have a particular need, I should use WordPress on a PC without internet connection.

All right, the only problem concerns the reference in the header of Jquery library:

<script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js?ver=1.7.1'> </ script>

How can I change the reference to include the library locally?
I did not even need to use the administration, then I could use to disable that too.

Thank you.