6Byrne, B. M. 1996a. Academic self-concept: Its struc ture, measurement, and relation to academic achievement [A]. In B. A. Bracken (ed.). Hand book of Self-concept: Developmental, Social, and Clinical Considerations [C]. New York: John Wi- ley & Sons, Inc..
7Byrne, B. M. 1996b. Measuring Self-concept across the Life Span [M]. Washington DC: American Psy chological Association.
8Gass, S. & L. Selinker. 2001. Se cord Language Acquisition: An Introductory Course [M]. 2nd Edition. New Jersey: Lawrence Erlbaum.
9Ma, D. (马冬梅) 2003. English self-concept of Chinese college English majors [ D]. MA thesis. GuangdongUniversity of Foreign Studies.
10Marsh, H. W. & R. J. Shavelson. 1985. Self-concept:Its multifaceted, hierarchical structure [J]. Educa tional Psychologist 20: 107-125.
