8Levin, J. Anglin, G. and Carney, R. On Empirically Validating Functions of Pictures in Prose[A]. Houghton, H. and Willows, D. The Psychology of Illustration, volume 1: Basic Research [C]. New York~ Springer Verlag, 1987.
9Hunter, B., Crismore, A. & Pearson, P.D. Visual displays in basal readers and social studies textbooks [A]. Willows,D. M. ga Houghton,H. A. (Eds.). The psychology of illustration, Vol II[M]. NY: Springer-Verlag, 1987.
10Tang, Gloria M. Textbook illustrations: a cross-cultural study and its implications for teachers of language minority students[J]. The Journal of Educational Issues of Language Minority Students, 1994,13 :175-194.
