This citation manual provides an "open and compatible implementation of a uniform system of citation" for the laws, cases, and secondary materials of all jurisdictions, globally. The Indigo Book is available in both PDF (below) and HTML (through this link). It is not affiliated with The Columbia Law Review Association, Inc., The Harvard Law Review Association, the University of Pennsylvania Law Review, The Yale Law Journal Company, Inc., or The Bluebook® A Uniform System of Citation®.