A manual for writers of research papers, theses, and dissertations, 7th edition - Kate L. Turabian 2007

Weblog entries and comments
Notes-bibliography style: citing specific types of sources
Part II. Source Citation

To cite an entry posted on a Weblog (or blog) by the author of the site, follow the basic pattern for Web sites. Include the author's name and the date of the posting. Such items should usually be cited only in a note. You generally need not include them in your bibliography, although you may choose to include a specific item that is critical to your argument or frequently cited.

N: 7. Gary Becker, “The New American Dilemma: Illegal Immigration,” The Becker-Posner Blog, entry posted March 6, 2006, http://www.becker-posner-blog.com/archives/2006/03/the_new_america.html (accessed March 28, 2006).

To cite a comment posted on a Weblog by someone other than the author of the site, follow the basic pattern for Weblog entries. Identify the material as a comment, and include the date when the comment (not the entry itself) was posted. If the comment author's name is incomplete or a pseudonym, add pseud. in brackets after the posted name.

N: 8. Peter Pearson, comment on “The New American Dilemma: Illegal Immigration,” The Becker-Posner Blog, comment posted March 6, 2006, http://www.beckerposner-blog.com/archives/2006/03/the_new_america.html#c080052 (accessed March 28, 2006).

11. Bill [pseud.], comment on “The New American Dilemma: Illegal Immigration,” The Becker-Posner Blog, comment posted March 10, 2006, http://www.beckerposner-blog.com/archives/2006/03/the_new_america.html#c080149 (accessed March 28, 2006).