Citation - A citation is an abbreviation showing where a piece of legal information can be located, either in paper or electronic format. Examples of citations include: 1993 US Lexis 2979, Rev. Rul 99-5, 157 US 429.

Shepard's® - Shepard's® Citations have been in use since 1873 when Frank Shepard first began printing lists of citations to Illinois Supreme Court cases. Shepard's® now covers all state and federal cases, statutes, administrative materials, and selected secondary material.

Document - Documents are pieces of information that make up the various sources. Documents are the results of your query and can vary in length depending upon the source used.

Source - A collection of documents on the LexisNexis database, pertaining to the same topic area.