In “Apostasy and Freedom of Religion in Malaysia,”Islamic Law & Law of the Muslim World eJournal,Joshua Neoh argues that the constitutional space for the freedom of religion in Malaysia is best carved out by drawing on constitutional law, international law and the common law.
In Constitutional Foundings in Southeast Asia, Hart Publishing, editors Kevin YL Tan and Ngoc Son Bui curate a series of historical essays that focus on the making, nature, and role of the first modern constitutions at the founding of the modern nation-states in Southeast Asia. Islamic law is particularly expanded upon in KoichiKawamura‘s chapter 3. The Origins of the 1945 Indonesian Constitution and BA Hussainmiya‘s chapter 8. The Making of Brunei’s 1959 Constitution.