Well since you seem to have no idea what a valid, proper souce actually is then below is a few links that will lead you to the proper MLA style, which will show you what a proper, valid source is...and sorry, but as I have stated several times, an arguement from an internet message board does not qualify as a valid source!

Links on what is a valid source and how to cite it!

http://honolulu.hawaii.edu/legacylib/mlahcc.html
http://www.studyguide.org/MLAdocumentation.htm
http://www.liu.edu/cwis/cwp/library/workshop/citmla.htm

As you can see from those examples, which there are many, many more that can be found...there are no examples for citing an internet message board...unless documentation comes from a website, personal, or professional then it is not considered a valid source and even in some professional and personal sites...certain things are not reliable either!!!