edited by Raymond Hickey
Wiley-Blackwell, 2010
Buku Teks SO
Weinreich, Uriel
Mounton, 1974
Buku Teks SO
Winford, Donald
Blackwell, 2003
Buku Teks
Heine, Bernd
Cambridge University Press, 2005
Buku Teks SO
Appel, René
Amsterdam Academic Archive, 2005
Buku Teks SO