UNESCO (2013). World Braille Usage. Washington, DC: National Library Service for the Blind and Physically Handicapped, Library of Congress. p. 88. ISBN978-0-8444-9564-4. Archived from the original on 2014-09-08. Retrieved 2013-12-19.
sakura.ne.jp
kunijima.sakura.ne.jp
"漢点字入門"(PDF). Archived from the original(PDF) on 31 December 2013. Retrieved 30 December 2013.
UNESCO (2013). World Braille Usage. Washington, DC: National Library Service for the Blind and Physically Handicapped, Library of Congress. p. 88. ISBN978-0-8444-9564-4. Archived from the original on 2014-09-08. Retrieved 2013-12-19.
"漢点字入門"(PDF). Archived from the original(PDF) on 31 December 2013. Retrieved 30 December 2013.