The Bluebook: A Uniform System of Citation is generally the default legal citation manual. It is compiled by the editors of the Columbia Law Review, the Harvard Law Review, the University of Pennsylvania Law Review, and The Yale Law Journal and began in 1926. It is now in its 21st edition. Other general legal citation manuals include ALWD, and The Redbook. Additionally, each jurisdiction and court may have its own citation rules. Ohio, for example, has its own writing manual.
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