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>
    <querypage name="Ancientpages">
      <results>
        <page value="20140919173629" timestamp="2014-09-19T17:36:29Z" ns="0" title="Outlook 2013" />
        <page value="20140922143132" timestamp="2014-09-22T14:31:32Z" ns="0" title="Configurando Clientes de E-Mail" />
        <page value="20140923193359" timestamp="2014-09-23T19:33:59Z" ns="0" title="Configurando clientes de email iOS7" />
        <page value="20140923195253" timestamp="2014-09-23T19:52:53Z" ns="0" title="Outlook:mac 2011" />
        <page value="20140929135913" timestamp="2014-09-29T13:59:13Z" ns="0" title="Apple Mail" />
        <page value="20140930152827" timestamp="2014-09-30T15:28:27Z" ns="0" title="Apple Mail (Mavericks)" />
        <page value="20141007181108" timestamp="2014-10-07T18:11:08Z" ns="0" title="Acessando o Dreamspark" />
        <page value="20141017173546" timestamp="2014-10-17T17:35:46Z" ns="0" title="Redirecionamento de Mensagens" />
        <page value="20150306134748" timestamp="2015-03-06T13:47:48Z" ns="0" title="Acesso à Mailboxes Compartilhadas" />
        <page value="20150306134857" timestamp="2015-03-06T13:48:57Z" ns="0" title="Página principal" />
      </results>
    </querypage>
  </query>
</api>