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Specify the format parameter to change the output format.
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<?xml version="1.0"?>
<api>
  <query>
    <pages>
      <page pageid="31" ns="0" title="Reference Sources">
        <revisions>
          <rev contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">[http://www.youtube.com/watch?v=JTG6jWL0ZqA EEVBlog #13 Part 1 of 2 - Digital Storage Oscilloscope Tutorial]

[http://www.youtube.com/watch?v=Ev121xAt_k4 EEVBlog #13 Part 2 of 2 - Comparison of PC Based Oscilloscopes]

[http://www.youtube.com/watch?v=xaELqAo4kkQ EEVBlog #279 - How NOT To Blow Up Your Oscilloscope!]

[https://ia600406.us.archive.org/23/items/TroubleshootingWithTheOscilloscope/TroubleshootingWithTheOscilloscope-Middleton_text.pdf Troubleshooting with the Oscilloscope by Robert G. Middleton]</rev>
        </revisions>
      </page>
      <page pageid="30" ns="0" title="References">
        <revisions>
          <rev contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">[http://www.youtube.com/watch?v=JTG6jWL0ZqA EEVBlog #13] Digital Storage Oscilloscope Tutorial</rev>
        </revisions>
      </page>
    </pages>
  </query>
</api>