1. Barton, D. (1976) “The Role of Perception in the Acquisition of Phonology,” Doctoral Dissertation, University of London. (Indiana University Linguistics Club)
2. “A System of Tone Letters,”;Chao;Le Maitre Phonétique,1930
3. “The Cantian Idiolect: an Analysis of the Chinese Spoken by a Twenty-eight-month-old Child,”;Chao,1973
4. Clumeck, H. (1977) “Studies in the Acquisition of Mandarin Phonology,” Doctoral Dissertation, University of California, Berkeley.
5. “Perception and Production in Child Phonology: The Testing of Four Hypotheses,”;Edwards;Journal of Child Language,1974