1. American Library Association (2006), “Library services for people with disabilities policy”, available at:www.ala.org/ascla/resources/libraryservices (accessed 7 June 2018).
2. International Federation of Library Associations and Institutions (2015), “IFLA manifesto for libraries serving persons with a print disability”, available at: www.ifla.org/publications/ifla-manifesto-for-libraries-serving-persons-with-a-print-disability (accessed 7 June 2018).
3. National Center for Education Statistics (2016), “Students with disabilities”, available at: https://nces.ed.gov/fastfacts/display.asp?id=60 (accessed 7 June 2018).
4. National Center for Education Statistics (2018), “Children and youth with disabilities”, available at: https://nces.ed.gov/programs/coe/indicator_cgg.asp (accessed 7 June 2018).
5. Library work for the hard of hearing;Volta Review,1934