A reference book is one you consult when you need factual, authoritative information on a subject. They are a good place to start if you're just beginning your research because they give you foundational information about a topic.
Reference book examples include:
Things to know about Reference books:
Collection of electronic reference books, dictionaries, and encyclopedias.
Collection of online reference books published by Gale.
The NSSL covers the changes that have happened in many areas of law since 2015. It provides an overall view of some of the most-asked about and controversial legal topics in the United States: abortion, the right to die, gun control, prayer in public schools, marijuana, marriage, personal income tax, drunk driving, capital punishment, right to work, lemon laws, leases and other agreements, child custody, legal ages, and many other areas. Presented in chart format, NSSL allows users to make basic state-by-state comparisons of current state laws.