MLA citations

My three MLA citations were somewhat hard to find as I am still trying to decide on my project subject.

"Human." Wikipedia. 8 May 2007. Wikipedia. 5 May 2007 http://en.wikipedia.org/wiki/Human.

Mayell, Hillary. "Documentary Redraws Humans' Family Tree." Nationalgeographic.Com. 1 Jan. 2003. National Geographic. 8 May 2007 http://news.nationalgeographic.com/news/2002/12/1212_021213_journeyofman.html.

Shreeve, James. "The Greatest Journey." National Geographic. 2007. National Graphic. 10 May 2007 .