How do I list this as an MLA format citation?

Since wikipedia is made up of so many sources I know it's not the most reliable but it's not my only source. I just need to still list it as a source. What is the correct way to list this article as an mla format citation? a href="http://en.wikipedia.org/wiki/RMS_Titanic" rel="nofollow"http://en.wikipedia.org/wiki/RMS_Titanic/a