Primary sources of law are constitutions, statutes, regulations, and cases. Lawmaking powers are divided among three branches of government: executive; legislative; and judicial. These three branches of government, whether federal or state, create primary sources of law.
This online CALI lesson explains the separation of powers among the three branches of government.
Branches of the U.S. Government from the U.S. General Services Administration
This federal government website describes the three branches of the U.S. Government and how they work together and check and balance one another.
Secondary sources are plain-language writings about the primary sources of law, and they are a great place to start research on any legal topic.
Legal encyclopedias alphabetically organize brief articles on legal subjects. The two main legal encyclopedias with national scope are:
The two main California legal encyclopedias are: