The legal citation for a case identifies the name of the court reporter in which the opinion is published and where the case can be found.
Opinions may be published in more than one reporter. These are called "parallel citations." LexisNexis Academic includes notations and page numbers of all the parallel citations for a case, including the Lexis citation. All of these are citations to the same case: REGENTS OF THE UNIVERSITY OF CALIFORNIA v. BAKKE
To identify a case in a research paper, use the name of the case and a legal citation taken from a print reporter. The Lexis citation may be included as a convenience.
The legal citation for a statutory law can be to the the Public Law / Statute version or to the codified version of the law. A Public law citation has the abbreviation P.L. (or Pub. L.), the Congress number, and the law number.
The legal citation for a statutory law can be to the the Public Law / Statute version or to the codified version of the law.