Ternes, Elmar
Einfuhrung in die phonologie
Wissenschaftliche Buchgesellschaft , 1999
 Buku Teks SO
Mol, Hendrik, 1919-1981
Fundamentals of phonetics I: the organ of hearing
Mouton, 1963
 Buku Teks
Mol, Hendrik, 1919-1981
Fundamentals of phonetics II : Acoustical models generating the formants of the vowel phonemes
Mouton, 1970
 Buku Teks
Heffner, R.M.S.
General phonetics
University of Wisconsin Press, 1960
 Buku Teks
Ladefoged, Peter
Vowels and consonants: an introduction to the sound of language
Blackwell publisher, 2001
 Buku Teks