You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20130408092538" timestamp="2013-04-08T09:25:38Z" ns="0" title="Meeting SP7 - 14-03-2013" />
        <page value="20130408103342" timestamp="2013-04-08T10:33:42Z" ns="0" title="Piano esecutivo SP7" />
        <page value="20130408105139" timestamp="2013-04-08T10:51:39Z" ns="0" title="Template slide" />
        <page value="20130408124040" timestamp="2013-04-08T12:40:40Z" ns="0" title="Update" />
        <page value="20130408132707" timestamp="2013-04-08T13:27:07Z" ns="0" title="Working Copy" />
        <page value="20130408132739" timestamp="2013-04-08T13:27:39Z" ns="0" title="Revisione" />
        <page value="20130408132831" timestamp="2013-04-08T13:28:31Z" ns="0" title="Tag" />
        <page value="20130408201822" timestamp="2013-04-08T20:18:22Z" ns="0" title="Template SP7" />
        <page value="20130502095137" timestamp="2013-05-02T09:51:37Z" ns="0" title="Skype conference - 06-03-2013" />
        <page value="20130502095215" timestamp="2013-05-02T09:52:15Z" ns="0" title="Skype conference 24-04-2013" />
      </results>
    </querypage>
  </query>
</api>