A history of Perak - Winstedt, R O (Kuala Lumpur Republished by the Malaysian Branch of the Royal Asiatic Society, Printed for the MBRAS by Perchetakan MAS Sdn. Bhd., 1974)
Malaysia}
Previously published as volume XII Part I, Journal of the Malayan Branch of the Royal Asiatic Society in June 1934 and in volume 2, 9