More suggestions and sources
Liev, Man Hau. 'Refugees from Cambodia, Laos and Vietnam.’ In Immigration and national identity in New Zealand, edited by Stuart William Greif, 99–132. Palmerston North: Dunmore, 1995.
McKinnon, Malcolm. Immigrants and citizens: New Zealanders and Asian immigration in historical context. Wellington: Institute of Policy Studies, Victoria University of Wellington, 1996.
Yoon, Hong-key, ed. Vietnamese, Indonesian and Hong Kong immigrants in Auckland. Occasional paper 34, Dept of Geography, University of Auckland, 1997.