Most people think of "the law" as laws that are passed by the legislature, but in reality the law is a complex interplay of three types of law. These types of law typically follow the structure of the jurisdiction's government. Therefore, in the United States the types of law are:

Chart created by the Georgia State University Law Library. Used with permission.
Generally, legal citations follow this format:
Example:
| Citation | Interpretation | 
| 29 CFR 100.101 | Title 29 of the Code of Federal Regulations, section 100.101 | 
| 410 U.S. 113 | Volume 410 of the United States Reports , page 113 | 
| 28 USC 1332 | Title 28 of the United States Code, section 1332 | 
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