"The causes of the social unrest in Maluku." Seminar on Sebab-sebab Timbulnya Kerusuhan di Propinsi Maluku dan Upaya Penanggulanngannya. June, 2002. (in Bahasa Indonesia)
"The spice islands and the Dutch East India Company." and "Eastern Indonesia during the 20th century: problems of adaptation?" Thamasat University, Thailand, 15-18 June 1998.
"The myth of the eternal return in the early modern history of Maluku." Seminar on Indonesian Social History, Jakarta, 8-11 December 1997.
"Developing a technology for the production of medicine in Indonesia, why is it late?" Kongres Nasional Sejarah, Jakarta, 8-11 November 1996. (in Bahasa Indonesia)
"The Silk Road: The integration of sea and land and Ternate as a harbour on thesilk road." Seminar Jalur Sutra, Ternate, 1995. (in Bahasa Indonesia)
"The Emporium of Banten: A historiographical overview." Simposium Kedudukan dan Peranan Bandar Banten dalam Perdagangan Internasional, Serang, 9 October 1995. (in Bahasa Indonesia)
The History of the city of Ambon. Ambon, 2004. (in Bahasa Indonesia)
(with Prof. Ivo Carneiro de Sousa, co ed.) Indonesia-Portugal: Five hundred years historical relation. Lisabon: Centro Portuguese de Estudos de Sudest Asiatico, 2002.
(translator) Oral history in Southeast Asia. (Translated into Bahasa Indonesia: Sejarah lisan di Asia Tenggara). Jakarta: LP3ES, 1999.
(translator) G. Mc. T. Kahin, Subversion as foreign policy. (Translated into Bahasa Indonesia: Subversi sebagai politik luar negeri). Jakarta: Grafitipers, 1997.
Minahasa in the early years of the war of independence. Jakarta: Penerbit Sinar Harapan, 1997. (in Bahasa Indonesia)
PRRI/Permesta: A strategy to build Indonesia without communism. Jakarta: Grafitipers, 1990. (3rd edition, 1996). (in Bahasa Indonesia)
Prof. Dr. Joke Wattimena: An outstanding Indonesian Pharmacologist. Jakarta, Penerbit Sinar Harapan, 1994. (in Bahasa Indonesia)
Biography of Ir. M. Putuhena. Jakarta: Depdikbud, 1984. (in Bahasa Indonesia)
A Social History of Maluku. Jakarta: Depdikbud, 1984. (in Bahasa Indonesia)
Memoar of Prof. Dr. G.A. Siwabessy. Jakarta: Gunung Agung, 1979. (in Bahasa Indonesia)
Parts of books
"Dynamics of the history of Minahasa." In Reimar Schefold (ed.), Minahasa: Past and Present. Leiden: Research School CNWS, 1995. Pp. 107-116.
"Changing maritime trade patterns in the Seram Sea." In G.J. Schutte (ed.), Trade and State in the Indonesian Archipelago. Leiden: KITLV Press 1994. Pp. 99-114.
"The migration of the Ambonese 1895-1920: Part of the history of Ambonese society." In Pemikiran Biografi dan kesejarahan: Kumpulan karangan. Jakarta: Depdikbud, 1983. Pp. 185-207. (in Bahasa Indonesia)
"Lambertus Smit de Haart: resident of Saparua 1817-1823." In Proceedings Dutch Indonesian Historical Conference, held at Laage Vuursche,the Netherlands, 23-27 June 1980. Leiden; Jakarta: Bureau of Indonesian Studies, 1982.
"Biography of Dr. J. Leimena." In Kewarganegaraan yang bertanggungjawab. Jakarta: BPK Gunung Mulia, 1979. (in Bahasa Indonesia)
"Local potentates and the competition for cloves in seventeenth century Ternate." In Proceedings 7th IAHA Conference, Bangkok, 22-26 August 1977. Chulalongkorn University, 1979. Pp. 310-376.
"The Dutch trading monopolies." In Haryati Soebadio and Carine A. Du Marchie Servaas (eds.), Dynamics of Indonesian History. Amsterdam-New York 1978. Pp. 189-206.
Articles
"Structuralism in History: an introduction." Mitra, Jurnal Budaya dan Filsafat. Special edition, August 2000. Pp. 25-31. (in Bahasa Indonesia)
(Book review) "Lambert Giebels, Soekarno, Nederlandsch Onderdaan. Een Biografie 1901-1950. Amsterdam 1999." Asian Journal of Political Science.Vol. 8. December 2000. Pp. 151-154.
"VOC as social history." Wacana, Jurnal Ilmu Pengetahuan Budaya. Vol. 1, no. 1. April 1999. Pp. 71-84. (in Bahasa Indonesia)
(Book review) "David Henley, Nationalism and regionalism in a colonial context: Minahasa in the Ducth East Indies." Bijdragen tot de Taal-, Land-, en Volkenkunde. Vol. 153, 2. 1997. Pp. 298-300.
"Emporium Banten: A Historiographical discourse." Jurnal Studi Indonesia. Vol. VII, no. 1. 1997. Pp. 96-106. (in Bahasa Indonesia)
"Dr. J.C. van Leur and economic history: a historiographical view." In Taufik Abdullah and Edi Sedyawati (eds.), Sejarah Indonesia: Penilaian Kembali Karya Utama Sejarawan Asing. Jakarta: Pusat Penelitian Universitas Indonesia, 1997. Pp. 183-204. (in Bahasa Indonesia)
"Copracontracten: an economic institution in Minahasa during the late colonial period." Verhandelingen Koninklik Instituut voor Taal-, Land-, en Volkenkunde. Vol. 167. 1996. Pp. 265-378.
"Social development in Ambon during the 19th century: the Ambonese burger." Cakalele: Maluku Research Journal University of Hawaii. Vol. 6. 1995. Pp. 1-12.
"In search of Maluku: a historiographical overview." In Hariani Senitiko (ed.) Kirana: Persembahan untuk Prof. Dr. Harjati Soebadio. Jakarta: Intermasa, 1995. Pp. 232-242.
"The History of Modern Indonesia: between continuity and discontinuity." Prisma. Vol. 23, no. 10. 1994. Pp. 3-20.
"The structure of Makasar-Bugis trade in pre-modern Maluku." Review of Indonesian and Malaysian affairs. Vol. 27, no. 1. 1993. Pp. 271-284.
"The idea of a 4th kingdom in 19th century Moluccas." In Buletin Khusus Leknas, Vol. III, no. 1. 1984. Pp. 173-190.