* [httpshttp://books.google.it/books?id=I2pXJyoOXwgC&pg=PA48&dq=Preservation+of+the+Sign+Language&hl=it&sa=X&ei=fDK5VP7pGNXlapeggKgJ&redir_esc=y#v=onepage&q=Preservation%20of%20the%20Sign%20Language&f=false Charlotte Lee Baker-Shenk, ''American Sign Language: A Teacher's Resource Text on Grammar and Culture'', 1991]
* [httpshttp://books.google.it/books?id=Ah32ktcvB28C&pg=PA97&dq=Preservation+of+the+Sign+Language&hl=it&sa=X&ei=HjO5VI-UNcPbavLdgng&redir_esc=y#v=onepage&q=Preservation%20of%20the%20Sign%20Language&f=false H-Dirksen L. Bauman, ''Open Your Eyes: Deaf Studies Talking'', 2008]
* [httpshttp://books.google.it/books?id=P6fbzUh2gUMC&pg=PA3&dq=Preservation+of+the+Sign+Language&hl=it&sa=X&ei=YDO5VKmyI5Gwad7QgbAP&redir_esc=y#v=onepage&q=Preservation%20of%20the%20Sign%20Language&f=false Language Brenda Schick Professor of Speech, and Hearing Science University of Colorado Boulder, Marc Marschark Director National Technical Institute for the Deaf, Department of Social Work Gallaudet University Patricia Elizabeth Spencer Professor of Psychology, ''Advances in the Sign Language Development of Deaf Children'', 2005]
* [httpshttp://books.google.it/books?id=mOwJlYenSWMC&pg=PA61&dq=Preservation+of+the+Sign+Language&hl=it&sa=X&ei=YDO5VKmyI5Gwad7QgbAP&redir_esc=y#v=onepage&q=Preservation%20of%20the%20Sign%20Language&f=false Katherine A. Jankowski, ''Deaf Empowerment: Emergence, Struggle, and Rhetoric'', 1997]
* [httpshttp://books.google.it/books?id=VZsEP0zeaDIC&pg=PA69&dq=Preservation+of+the+Sign+Language&hl=it&sa=X&ei=YDO5VKmyI5Gwad7QgbAP&redir_esc=y#v=onepage&q=Preservation%20of%20the%20Sign%20Language&f=false H-Dirksen L. Bauman, Jennifer L. Nelson, Heidi M. Rose, ''Signing the Body Poetic: Essays on American Sign Language Literature'', 2006]
