diff --git a/content/articles/course-html5/intro.md b/content/articles/course-html5/intro.md
index c2e713d..a181639 100644
--- a/content/articles/course-html5/intro.md
+++ b/content/articles/course-html5/intro.md
@@ -18,8 +18,10 @@ Title: Introducción a HTML5
 <ul class="ml-3">
 <li>[Respositorio oficial][html]{:target="_blank" rel="noopener noreferrer"} de HTML</li>
 <li>[w3schools][w3c]{:target="_blank" rel="noopener noreferrer"}</li>
+<li>[Documentación de la W3C][w3c.org]{:target="_blank" rel="noopener noreferrer"}</li>
 </ul>
 </details>
 
 [html]: https://github.com/whatwg/html
 [w3c]: https://www.w3schools.com/html/default.asp
+[w3c.org]: https://www.w3.org/TR/html/