Ternes, Elmar
Wissenschaftliche Buchgesellschaft , 1999
Buku Teks
Romadhani, examiner
Aldine, 1968
Buku Teks
Ladefoged, Peter
Blackwell publisher, 2001
Buku Teks
Malmberg, Bertil, editor
Presses universitaires de France, 1960
Buku Teks
Cambridge University Press, 2010
eBooks