A little piece on MLA citation and the decreasing amount of print resources.
Print no longer default MLA citation style
April 27, 2009 by Sonja Lind, Ph.D.
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The bigger problem is disappearing electronic resources, I think. http://webcitation.org/ provides a tidy solution by creating an archive of the webpage you wish to cite and returning an abbreviated URL in the form http://webcitation.org/5Kt3PxfFl. I wonder if the MLA people considered this.