diff --git a/contributing.md b/contributing.md
index fc679a3..058318a 100644
--- a/contributing.md
+++ b/contributing.md
@@ -9,5 +9,6 @@
 * Check your spelling and grammar.
 * Make sure your text editor is set to remove trailing whitespace.
 * Items that are not in English, must have their language specified.
+* If the item is a link for slides, direct download or anything that is not an article, add the content in parethesis (download), (slides) or something tag it.
 
 based on https://github.com/afonsopacifer/awesome-flexbox/blob/master/contributing.md