Dorf, M. B., & Scharry, E. R. (1961). Instruction manual for braille transcribing (2nd. ed.). Library of Congress, Division for the Blind.
Dyfyniad Arddull ChicagoDorf, Maxine B., and Earl R. Scharry. Instruction Manual for Braille Transcribing. 2nd. ed. Wash.: Library of Congress, Division for the Blind, 1961.
Dyfyniad MLADorf, Maxine B., and Earl R. Scharry. Instruction Manual for Braille Transcribing. 2nd. ed. Library of Congress, Division for the Blind, 1961.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.