Sugiyono
Universitas Indonesia, 1996
UI - Tesis (Membership)
Ladefoged, Peter
Blackwell Publishing, 2003
Buku Teks
Hughes, John P.
Random House, 1962
Buku Teks
General editor E.F. Konrad Koerner
John Benjamins B.V. , 1979
Buku Teks
William J. Hardcastle, John Laver, Fiona E. Gibbon, editor
Wiley-Blackweell, 2013
Buku Teks