1Jones,G. E. Investing in Rural Extension:Strategies and Goals [M]. London: Elsevier Applied Science Publish-ers, 1986.
2Gao, Qijie. Agricultural Extension Philosophy and Principles. In Chinese Agriculture and Agro-Extensio-A Reference Book for International Agro-Training in China, Nie Chuang (ed) [M]. Beijlng: China Agricultural Science gc Technology Press, 2006.
3Gao, Qijie N- Zhang, Chuanhong. Agricultural Tech- nology Extension System in China= Current Situation and Reform Direction[J]. Management Science and Engineering, 2OO8, (04).
4Roeling, N. Extension Science[M]. Cambridge Uni- versity Press, 1988.
5Swanson, B. E. et al. Agricultural extension: a reference manual [Z]. Rome: FAO Agricultural Service Bul- letin, 1984.
6van den Ban,A. W. and Hawkins,H. S. Agricultur- al extension (second edition)[M]. New Delhi: CBS Publish- ers & Distributors, 1998.
