This document summarizes the key sources of law in 3 categories: legal sources, literary sources, and specific sources. The legal sources that establish existing rules of law are the constitution, case law, legislation, equity, and custom. The literary sources that provide written records of legal rules include law reports, books, historical sources, and legal histories. The constitution is described as the most important legal source, establishing fundamental rights and government structure. Case law/common law develops legal principles from judicial precedents. Legislation includes acts of parliament and delegated legislation created by statutory bodies. Equity developed in parallel to the common law to provide fairness and remedies.