Start Here
Try this book for a good place to start when doing research on East Timor. Be certain to read the Introduction to the Bibliography (pages 193-201) and see the bibliography that follows (pages 201-262):
Historical Dictionary of East Timor by Geoffrey C. Gunn
Lanham, Md. : Scarecrow Press, 2011.
Paper Copy: Kroch Library Asia Reference (Non-Circulating) DS649.5 .G85 2011
Online Copy: https://newcatalog.library.cornell.edu/catalog/8378699
Here is an older (1992) but useful research book containing annotated title listings of major and standard information sources covering a large number of topics:
Timor (World Bibliographical Series) by Ian Rowland
Santa Barbara, Calif. : Clio Press, ©1992.
Paper Copy 1: Kroch Library Asia Reference (Non-Circulating) Z3277.T58 R88 Note: Shelved in dictionary stand by Asia desk.
Paper Copy 2: Library Annex Z3277.T58 R88
Online Copy: https://newcatalog.library.cornell.edu/catalog/9894707
For more introductory sources on East Timor see here: Quick Reference Sources for Southeast Asia: Indonesia & East Timor
Databases (find articles etc.)
Bibliography of Asian Studies (a good standard database for finding articles about Asia)
Women's Studies Bibliography: East Timor
East Timor Book Chapter Database (collects chapters/articles about East Timor from edited volumes)
ABIA South and Southeast Asian art and archaeology
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: East Timor (Great source for links to information about East Timor)
Southeast Asia visions : a collection of historic travel narratives
South East Asian images & texts project : SEAiT
Statistics
Statistics Sources for Asia: Indonesia and Timor-Leste
Bibliographies
Roff, Sue Rabbitt. East Timor : a bibliography, 1970-1993. Canberra : Australian National University, Research School of Pacific Studies, Peace Research Centre, [1994]
Rowland, I. R. Timor : Including the Islands of Roti and Ndao. Oxford, England ; Santa Barbara, Calif. : Clio Press, c1992. (World Bibliographical Series, vol. 142) (1992) (Ref Z3277 .T58 R88)
Sherlock, Kevin. A bibliography of Timor : including East (formerly Portuguese) Timor, West (formerly Dutch) Timor and the island of Roti. Canberra: Australian National University, 1980. (Ref Z 3277.T58 S55)
History Sources
Rony, A. Kohar and Iêda Siqueira Wiarda. The Portuguese in Southeast Asia : Malacca, Moluccas, East Timor. Hamburg : Abera Verlag Meyer & Co., c1997. (Ref Z 3221 .R66 1997) (Abera bibliographies ; vol. 1)
Colonial Era Resources
Rony, A. Kohar and Iêda Siqueira Wiarda. The Portuguese in Southeast Asia : Malacca, Moluccas, East Timor. Hamburg : Abera Verlag Meyer & Co., c1997. (Ref Z 3221 .R66 1997) (Abera bibliographies ; vol. 1)
Dictionaries and Encyclopedias
Gunn, Geoffrey C. Historical dictionary of East Timor. Lanham, Md. : Scarecrow Press, 2011. (Ref DS649.5 .G85 2011)