1. Chistovich, L. A., Klass, I. A., &Kuz’min, I. I. (1962).The process of speech sound discrimination. Boston: Emmanuel College Research Center.
2. Cohen, J., MacWhinney, B., Flatt, M., &Provost, J. (1993). PsyScope: An interactive graphic system for designing and controlling experiments in the psychology laboratory using Macintosh computers.Behavior Research Methods, Instruments, & Computers,25, 257–271.
3. Condon, W. (1976). An analysis of behavioral organization.Sign Language Studies,13, 285–318.
4. Fowler, C. A. (1994). Speech perception: Direct-realist theory. In R. E. Asher (Editor-in-Chief ) & J. M. Y. Simpson (Coordinating Ed.),The encyclopedia of language and linguistics (Vol. 8, pp. 4199–4203). Oxford: Pergamon.
5. Giles, H. (1973). Accent mobility: A model and some data.Anthropological Linguistics,15, 87–105.