1. Human-Computer Interaction Handbook: Fundamentals, Evolving Technologies and Emerging Applications;VL Hanson,2008
2. Allen C, Haualand H. Deaf People and Human Rights. World Federation of the Deaf and Swedish National Association of the Deaf (Research Report) World Federation of the Deaf website. [Internet]. 2009 [cited 2014 Jul 1]. Available from: http://www.hrc.co.nz/hrc_new/hrc/cms/files/documents/06-May-2009_15-14-55_DeafPeople_HumanRightsReport.pdf
3. Web Accessibility: A Foundation for Research;AC Cavender,2008
4. World Federation of the Deaf (WFD) Sign Language [Internet]. 2013 [cited 2014 Jul 1]. Available from: http://wfdeaf.org/human-rights/crpd/sign-language
5. Reading comprehension difficulties: Processes and intervention;M Marschark,1996