Bibliografi Vokal_tak_bundar_pusat_hampir_sempit

  • Abdel-Massih, Ernest T. (1971). A Reference Grammar of Tamazight. Ann Arbor: University of Michigan. 
  • Ball, Martin J. (1984), "Phonetics for phonology", written at Cardiff, in Ball, Martin J. & G.E Jones, Welsh Phonology, University of Wales Press, ISBN 0-7083-0861-9
  • Jones, Daniel & Ward Dennis (1969), The Phonetics of Russian, Cambridge University Press