“Jadual Keempat Perjanjian Persekutuan Tanah Melayu 1957: Intipati dan Kepentingannya kepada Kedah: The Fourth Schedule of the Federation of Malaya Agreement 1957: Its Essence and Importance to Kedah”, LPS Journal, vol. 5, no. 1, pp. 158–169, Oct. 2026, doi: 10.55265/lpsjournal.v5i1.155.