1. Identification and Discrimination of Phonemic Tones
2. Aslin, R. N. (1987). Visual and auditory development in infancy. In J. D. Osofsky (Ed.), Handbook of infant development (2nd ed., pp. 5-97). Oxford, England: Wiley.
3. Atkinson, J. (2000). The developing visual brain. Cambridge, England: Oxford University Press.
4. The perception of handshapes in American Sign Language
5. Battison, R. (1978). Lexical borrowing in American sign language. Silver Spring, MD: Linstock.