1. Customs: Customs is one of the earliest sources of law. It is the code of conduct observed by people in society. When the state was established, these customs received recognition and became laws.

2. Religion: In many countries, religion is the basis of the law and it lies as the root of many national legal systems. 

3. Equity: It refers to the principles of equality, fairness, and justice in which judges apply. When existing laws provide no relief in a particular case, judges apply the principle of equity.

4. Judicial decisions: Judges interpret mould and extend the existing laws. Such decisions of the judges later become precedents judicial precedents supplement the law and are applied in the future cases of a similar kind.

5. Scientific commentaries: These are scientific discussions by eminent jurists or lawyers. It is an important source of material for lawmakers.

6. Legislation: It means the enactment and promulgation of laws by the legislature. It forms an important source of law.