Question on citing,

I know how to cite articles and web pages but how would I come about citing what people said in an open discussion? Or rather, I want to quote someone's response on a blog.

Thanks!

To cite a blog:

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Use Personal Site.

To cite a person in a discussion:
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You would use only the person's name and the date. You would also include "discussion in _______" and name the class or situation in which the discussion was taking place. Omit any reference to a publication or website, of course.