“Warisan Wilayah Utara Semenanjung Malaysia by Ooi Keat Gin, Pulau Pinang: Penerbit Universiti Sains Malaysia, Pulau Pinang. Pp. 1–258”. 2013. KEMANUSIAAN The Asian Journal of Humanities 20 (1): 81–85. https://ejournal.usm.my/kajh/article/view/kajh_vol20-no-1-2013_5.