Important Sources of Indian Constitution

Government of India Act 1935	Federal Scheme Emergency Provisions Public Service Commissions Office of Governor Judiciary Administrative Details
Constitution of the United States	Preamble Fundamental Rights The federal structure of government Electoral College Independence of the judiciary and separation of powers among the three branches of the government Judicial review President as Supreme Commander of Armed Forces Equal protection under law
British constitution	Parliamentary form of government The idea of single citizenship The idea of the Rule of law Writs Institution of Speaker and his role Lawmaking procedure Procedure established by Law
Irish constitution (Ireland)	Directive Principles of State Policy Nomination of members to Rajya Sabha Method of Election of President
Australian constitution	Freedom of trade and commerce within the country and between the states Power of the national legislature to make laws for implementing treaties, even on matters outside normal Federal jurisdiction Concurrent List
French constitution	Republic and the ideals of Liberty, Equality and Fraternity in the Preamble
Constitution of South Africa	Procedure for amendment Election of Rajya Sabha members
Constitution of Soviet Union (USSR)	Fundamental Duties under Article 51-A A Constitutionally mandated Planning Commission to oversee the development of the economy
Constitution of Germany	Emergency powers to be enjoyed by the Union Suspension of Fundamental Rights during an emergency.
Constitution of Japan	Procedure Established by Law
Constitution of Russia	Fundamental Duties Idea of Social, Economic, and Political Justice in Preamble