4Breen M P, Candlin C N. Which Materials. AConsumer's and Designer's Guide [ C ] //L ESheldon. ELT Textbooks and Materials : Problemsin Evaluation and Development. London: ModernEnglish Publications in Association with the BritishCouncil. 1987: 13—28.
5McDonough J, Shaw C. Materials and Methods inELT [M]. Cambridge and Mass: Blackwell, 1993:59—72.
6Hutchinson T, Torres E. The Textbook as Agent ofChange [ J ]. ELT Journal, 1994,48 (4):315—328.
