Hamzah. (1991). The oil sultanate: Political history of oil in Brunei Darulsalam. Mawaddah Enterprise.
Chicago Style (17th ed.) CitationHamzah. The Oil Sultanate: Political History of Oil in Brunei Darulsalam. Seremban: Mawaddah Enterprise, 1991.
MLA (8th ed.) CitationHamzah. The Oil Sultanate: Political History of Oil in Brunei Darulsalam. Mawaddah Enterprise, 1991.
Warning: These citations may not always be 100% accurate.