(Lillo-Martin (1999) e Newport e Meier (1985)).

- Lillo-Martin, D. (1999) “Modality Effects and Modularity in Language Acquisition: The Acquisition of American Sign Language”. In T. Bhatia e W. Ritchie (eds.), Handbook of Language Acquisition. San Diego: Academic Press: 531-567.

- Newport, E. e R. Meier (1985) “The Acquisition of American Sign Language”. In: D. I. Slobin (ed.), The Crosslinguistic Study of Language Acquisition, vol. 1. Hillsdale, NJ: Lawrence Erlbaum Associates: 881-938.