Bibliografi Vokal_pusat_tengah

  • Barbosa, Plínio A. & Eleonora C. Albano (2004), "Brazilian Portuguese", Journal of the International Phonetic Association 34 (2): 227-232
  • Crosswhite, Katherine Margaret (2000), "Vowel Reduction in Russian: A Unified Account of Standard, Dialectal, and 'Dissimilative' Patterns", University of Rochester Working Papers in the Language Sciences 1 (1): 107-172
  • Cruz-Ferreira, Madalena (1995), "European Portuguese", Journal of the International Phonetic Association 25 (2): 90-94
  • Fougeron, Cecile & Caroline L Smith (1993), "Illustrations of the IPA:French", Journal of the International Phonetic Association 23 (2): 73-76
  • Jones, Daniel & Ward Dennis (1969), The Phonetics of Russian, Cambridge University Press
  • Roach, Peter (2004), "British English: Received Pronunciation", Journal of the International Phonetic Association 34 (2): 239-245