1. Sopon Pornchokchai, 1020, Japanese Volunteer Center, Bangkok, 1985.
2. National Housing Authority, Slum Eviction Survey — 1987, Bangkok.
3. Statistical Yearbook, 1972–1983;National Statistical Office,1972
4. Where have all the people gone?;Angel;paper presented at the International Seminar on Planning for Settlements in Rural Regions: The Case of Spontaneous Settlements, United Nations Centre for Human Settlements (Habitat), Nairobi, Kenya,1985