Start Here
Try this book for a good place to start when doing research on Brunei. Be certain to read the Introduction to the Bibliography (pages 359-362), and see the bibliography that follows (pages 362-399):
Historical Dictionary of Brunei Darussalam (3rd edition) by
Brunei by Sylvia C. Engelen Krausse
Oxford, England ; Santa Barbara, Calif. : Clio Press, ©1988.
Paper Copy 1: Kroch Library Asia Reference (Non-Circulating) Z3248.B7 K91
Paper Copy 2: Kroch Library Asia Z3248.B7 K91
Online Copy: https://newcatalog.library.cornell.edu/catalog/9894699
Databases
PERIND (Bibliographic database that indexes periodical literature relating to Singapore, Malaysia, Brunei, and ASEAN)
Bibliography of Asian Studies (a good standard database for finding articles about Asia)
Women's Studies Bibliography: Brunei
Brunei Book Chapter Bibliography (collects chapters/articles about Brunei from books that could be easily missed)
ABIA South and Southeast Asian art and archaeology index
Southeast Asian Archaeology Scholarly Resources (has a bibliography of archaeology sources)
Bibliography of Performing Arts in the East (theatre, dance, puppetry, cinema, plays, masks, martial arts)
Other Resources
Southeast Asia Digital Library: Brunei (Great source for links to information about Brunei)
Southeast Asia visions : a collection of historic travel narratives
South East Asian images & texts project : SEAiT
Islam in Southeast Asia - An Introductory Guide
Asian Economic History, Series 2 (Economic development in Brunei, Hong Kong, Malaysia, Singapore, South Korea and Taiwan, 1950-1980 Public Record Office files from the Foreign Office, Colonial Office, Treasury, Dominions Office, Board of Trade and Cabinet Committees)
Statistics
Statistics Sources for Asia: Malaysia, Singapore, Brunei
Bibliographies
Berita. Chicago, Ill. : Southeast Asia Council, 1975- . (+DS501 .B51 - c.i. RR)
Cotter, Conrad Patrick. Bibliography of English Language Sources on Human Ecology : Eastern Malaysia and Brunei. Honolulu : Dept. of Asian Studies, University of Hawaii, 1965. (Ref +Z3261 .C84) (2 v.)
Francis, Simon. Brunei Checklist : a Bibliography of English-Language References Relating to Brunei Darussalam. Hull : University of Hull, Centre for South-East Asian Studies, 1993. (Ref +Z3261 .F81) (Bibliography and literature series ; 10.)
Horton, A. V. M. A Critical Guide to Source Material Relating to Brunei : with Special Reference to the British Residential Era, 1906-1959. Bordesley, Worcestershire, U.K. : A.V.M. Horton, 1994. (Ref ++Z3261 .H82 1994)
Krausse, Sylvia C. Engelen and Gerald H. Krausse. Brunei. Oxford, England ; Santa Barbara, Calif. : Clio, 1988. (Ref Z3248 .B7 K91) (World Bibliographical Series, v. 93)
History Sources
General Histories
Brown, Donald E. Brunei : the structure and history of a Bornean Malay . Brunei : Brunei Museum, 1970. (DS646.35 .B87)
Horton, A. V. M. The British residency in Brunei, 1906-1959 . Hull : University of Hull, Centre for South-East Asian Studies, 1984. (Occasional paper (University of Hull. Centre for South-East Asian Studies) ; no. 6.)
____________. A new sketch of the history of Negara Brunei Darussalam. Bordesley, Worcestershire, U.K. : A.V.M. Horton, 1995. (DS 650 .5 .H82 1995)
Jessy, Joginder Singh. Malaysia, Singapore & Brunei, 1400-1965. 2nd rev. ed. Kuala Lumpur : Longman Malaysia, 1974. (DS596 .J58 M2 1974)
Ranjit Singh. Brunei, 1839-1983 : the problems of political survival. Singapore ; New York : Oxford University Press, 1991. (DS646.357 .R36 1991)
Saunders, Graham E. A history of Brunei. London ; New York : RoutledgeCurzon, 2002. (DS 650.5 .S28x 2002)
Tarling, Nicholas. Britain, the Brookes, and Brunei. Kuala Lumpur, New York, Oxford University Press, 1971. (+ DS646.35 T18)
Turnbull, C. M. A history of Malaysia, Singapore, and Brunei. Sydney, Australia; Boston : Allen & Unwin , 1989 (DS596 .T94 1989)
Wright, L. R. The origins of British Borneo. Hong Kong : Hong Kong University Press, 1970. (DS646.3 .W95 1970)
Dictionaries/Encyclopedias
Horton, A. V. M. Negara Brunei Darussalam : a biographical dictionary, 1860-1997. Bordesley, Worcestershire, U.K. : A.V.M. Horton, 1998. (Ref DS 650 .44 .H82 1998) Ranjit Singh and Jatswan S. Sidhu. Historical dictionary of Brunei Darussalam.
Sidhu, Jatswan S. Historical dictionary of Brunei Darussalam. Lanham, Maryland : Rowman & Littlefield, 2017 (Ref DS 650.5 .S56 2017)
Bibliographies
Francis, Simon. Borneo in history : a catalogue of books in the Borneo collection of the University Library describing Borneo before 1960. Brunei Darussalam : University Library, University Brunei Darussalam, 1990. (Siri bibliografi Perpustakaan U.B.D. ;no. 4.) (Ref + Z 3246 .U68x 1990)
Horton, A. V. M. A critical guide to source material relating to Brunei: with special reference to the British residential era, 1906-1959 Bordesley, Worcestershire, U.K. : A.V.M. Horton, c1994. (Ref ++ Z 3261 .H82 1994)
Normah Yahya. Local history collection : an annotated bibliography. Kota Kinabalu : Sabah State Library, 1993. (Ref + Z 3246 .N67x 1993)
Simanjuntak, S. Hasnah. Bibliografi mengenai sejarah, politik dan pemerintahan Negara Brunei Darussalam = Bibliography on history, politics and government of Brunei Darussalam. Gadong : Perpustakaan Universiti Brunei Darussalam, 1987. (+ Z3264.H6 S58 1987a)