6Nikniaz A, Alizadeh M. Community participation in environmental health:Eastern Azerbaijan Healthy Villages project [ J ]. East Medi- terr Health J,2007,13 ( 1 ) : 186 - 192.
7Berland GK, Elliott MN, Morales LS, et al. Health information on the imernet accessibility, quality and readability in English and Spanish [J]. JAMA,2012,285(20) :2612 -2621.
8Dechant EV, Smith HP. Psychology of teaching reading[ M ]. 2rid ed. New Jersey : Prentice-Hall, 1977.
9Barak R. New correlates of readability and listenability[ M ]. Boston: International Reading Association conference, 1968.
10Klare GR. The measurement of readability [ M ]. Ames: Iowa State University Press, 1963.