Lyons, John, author
Cambridge University Press, 1991
Buku Teks
The Australian National University, 1964
Buku Teks
by Bernard Bloch, George L. Trager
Baltimore, 1942
Buku Referensi
Ledefoged, Peter
Univeersity of Chicago Press, 1971
Buku Teks
Losonsky, Michael, author
Cambridge University Press, 2006
Buku Teks