References

Klinman, K., C. Talabmook and T. Tanee, 2011. Knowledge attitude behavioral and cholinesterase level of agriculturist on pesticides in Nakhon Sawan Province. Social Sci., 6: 141-143.
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Ministry of Science Technology and Environment, 2001. Report of environmental quality situation. 2543 B.E. Bangkok.

Nakhon Sawan Provincial Health Office, 2008. Annual Report 2551 B.E. Nakhon Sawan Provincial. http://www.nswo.moph.go.th/data/Nswo_Final%2051.pdf

Neuman, W.L., 1991. Social Research Methods: Quantitative and Qualitative Approaches. 2nd Edn., Allyn and Bacon, Boston, London.

Veeravatnanon, V., 2003. Environmental Education. 3rd Edn., Odeon Store Printing House, Bangkok, Pages: 8.