1. Accessibility and Usability at Penn Sate Language tags in HTML http://accessibility.psu.edu/foreignlanguages/langtaghtml/
2. Allvip 2018 New ways in language learning for blind and visually impaired people https://allvip.org/2018/05/03/new-ways-in-language-learning-for-blind-and-visually-impaired-people/
3. Andriani , R. 2016 The Guardian https://www.theguardian.com/stage/2016/sep/10/i-love-theatre-and-im-blind-heres-how-that-works
4. Teaching English to visually impaired students in Turkey: A case study;Başaran;Energy, Education, Science and Technology. Part B: Social and Educational Studies,2012