(1) NHK(7 November 2020) [おはよう日本] 手話が飛び交うコーヒー店 HUMAN | NHK Retrieved from https://www.nhk.or.jp/d-garage-mov/movie/41-446.html
(2) NHK (3 August 2020) 静かで、にぎやかな学校 Retrieved from https://www.nhk.or.jp/heart-net/movie/188/
(3)全日本ろうあ連盟 (25 April 2018) 手話言語を広める取組 - 全日本ろうあ連盟 Retrieved from https://www.jfd.or.jp/info/misc/sgh/20180425-sgh-chijinokai/chijinokai-hirai.pdf
(4)World Federation of the Deaf (2021) International Week of Deaf People 2021 and International Day of Sign Languages 2021 #IWDP & #IDSL https://wfdeaf.org/iwdeaf2021/
(5) Lenore T. Adkins (21 September 2021) How do sign language interpreters work? Retrieved from https://share.america.gov/how-do-sign-language-interpreters-work/
(6) M. Moon (21 September 2021) Snapchat's new lenses and stickers can teach you basic sign language Retrieved from https://www.engadget.com/snapchat-lenses-stickers-basic-sign-language-100047839.html
(7) German Commission for UNESCO (2021) German Sign Language – DGS Retrieved from https://www.unesco.de/en/culture-and-nature/intangible-cultural-heritage/german-sign-language
(8) Robert Adam (22 September 2020)Sign languages and deaf people during Covid-19: how you can help in the classroomHistory of British Sign Language Retrieved from https://www.cambridge.org/elt/blog/2020/09/22/sign-languages-and-deaf-people-during-covid-19-how-you-can-help-in-the-classroom/