5[16]Marsh H W. Gntent specificity of relations between academic achievemerit and academic self- concept. Journal of Educational Psychology,1992(1).
6[17]Marsh H W, et al.A multifaceted academic self- concept:its hierarchal structure and its relation to academic achievement. Journal of Educational Psychology, 1988(2).
7[18]Marsh H W. Influences of internal and external frames of reference on the formation of math and English self- concepts. Journal of Educational Psychology, 1990(1 ).
8[19]Cross S E, Markus H R. Self- schemas, possible self, and competent performance. Journal of Educational Psychology, 1994(3).
9[20]Markus H R, Nurius. Possible selves. American Psychologist, 1986,41.
