Graham E. (2002), A history of Brunei, Routledge, ISBN 978-0-7007-1698-2. p.57 ^ "The era of Sultan MuhammadHassan". The Brunei Times. 1 March 2009. Archived
(2004). “Population parameters and exploitation rate of demersal fishes in Brunei Darussalam”. Fisheries Research (Amsterdam) (Elsevier) 69 (1): 73–90. doi:10