With the objective of characterizing the Law bibliographic sources more used by the magistrates of the 4th Region of Brazilian Labour Court, and identifying which authors are more mentioned and which the criteria used by the authors to the documental citation. This identification will qualify documental core used for documental language development adopted in the Service of Documentation. All papers published by 4th Region were analyzed and lifted up characteristics of the citations, such as: authors more mentioned, journals more mentioned, type of used documental support, citation type more adopted, languages of the citations and age of the mentioned works. A WinISIS database was used for registration of the collected data and for the calculation of variables occurrences
