1 2 Noor Shahidah Ismail; Norazean Hamdan; Siti Nadia Ameer Hamza; Wan Fatimah Wan Shamshudin (2011). Wan Zuhairi bin Wan Yaacob (penyunting). "Gempa Bumi: Pengenalan". Pengajaran STAG3042. Universiti Kebangsaan Malaysia.
↑ Lutgens, Tarbuck, Tasa. Essentials of Geology (ed. ke-11). m/s. 32.CS1 maint: multiple names: authors list (link)
