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2. Skeldon, R. (2005): Migrations and thinking about migrations: introductory remarks towards a historiography of population movement. In Ishikawa, Y. ed. Migration in Asia and the Pacific. Tokyo: Akashi Syoten. (text in Japanese)
3. Soda, R. (2007): People on the move: rural-urban interactions in Sarawak. Kyoto University Press and Trans Pacific Press.
4. Soda, R. (2008): Approaches to rethinking rural-urban migration in Southeast Asia: a case of the Iban in Sarawak, Malaysia. E-Journal GEO, 3(1), 1-17. (text in Japanese)
5. Sutlive, V. and Sutlive, J. eds. (2001): The encyclopedia of Iban studies (volume I-IV). Kuching: The Tun Jugah Foundation.