Legal Citation Introductory signals are used in legal citations to present authorities and show how the authorities relate to propositions in textual statements. Introductory signals do not carry identical meaning across modern U.S. style systems. The three most prominent citation manuals are The Bluebook: A Uniform System of Citation
[1] and the ALWD Citation Manual
[2]and The Maroonbook
[3]. Some state-specific style manuals also provide guidance on legal citation. The Bluebook citation system is both the most comprehensive and most widely used system by courts, law firms, and law reviews. Below is a brief explanation of the introductory signals used in legal writing under the Bluebook system: Introductory Signals Signals That Indicate Support[no signal]Cited authority directly states the proposition, identifies the source of a quotation, or identifies an authority referred to in the text.
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