How do I cite a blog post comment in APA Style?
Lastname, A. (year, Month day). Re: Title of blog post [Blog comment]. Retrieved from URL
The name cited in the reference should be that of the commenter, not of the author of the post. Provide the full date of the comment. Insert "Re:" in front of the title of the blog post, with the text "[Blog comment]" following the title. The URL should be the direct URL to the specific comment, not to the blog post.
Smith, T. (2010, November 24). Re: How to cite something you found on a website in APA Style [Blog comment]. Retrieved from http://blog.apastyle.org/apastyle/2010/11/how-to-cite-something-you-found-on-a-website-in-apa-style.html#comment-6a01157041f4e3970b0147e021323e970b
In-text citation: (Smith, 2010, para. 2)