A couple of things...
When you add a reference to a Wikipedia article, please consult the above instructions on how to fill out a complete citation.  Bare URLs are not very much help when 
readers want to verify information and 
when readers want to assess if information comes from a reliable source. They are also prone to linkrot which makes it difficult to maintain the Wikipedia policy of Verifiability.
At the end of a sentence, please put the period before you add a reference.
Thanks,