(2001) Science Curriculum Standards. Beijing Normsl Univeristy Press, Beijing, 8-10.
 Yuan, K.Y. (2001) Science (Grade 7). Eastchina Normsl Univeristy Press, Shanghai, 3-5.
 Parrish, P.E. (2009) Aesthetic Principles for Instructional Design. Joint Information Systems Committee (JISC).
 Reiser, R.A. and Dempsey, J.V. (2008) Trends and Issues in Instructional Design and Technology. 2nd Edition, Pearson Education, Inc., 312-321.