[W3C] Validation sur un lien PHP avec la méthode GET

Bonjour à tous, j'ai un probléme avec le W3C Validator, et je ne le comprends pas du tout :

Code:

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#  Error  Line 18, Column 92: an attribute value must be a literal unless it contains only name characters.
 
…moons</h3><p>flux rss<a href=news.php?"news"="53">Lire la suite</a></p></div>
 
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You have used a character that is not considered a "name character" in an attribute value. Which characters are considered "name characters" varies between the different document types, but a good rule of thumb is that unless the value contains only lower or upper case letters in the range a-z you must put quotation marks around the value. In fact, unless you have extreme file size requirements it is a very very good idea to always put quote marks around your attribute values. It is never wrong to do so, and very often it is absolutely necessary.

Quelqu'un pourrait me dire ce qui cloche? Merci :)