Chambers's twentieth century dictionary of the english language
edited by Thomas Davidson
W. & R. Chambers, 1901
 Buku Referensi
The Cambridge handbook of language policy
Bernard Spolsky, editor
[Cambridge University Press, ], 2012
 eBooks
The Cambridge handbook of language policy
Bernard, Spolsky, editor
Cambridge University Press, 2012
 Buku Teks
Schiffman, Harold F.
Linguistic culture and language policy
Routledge, 1996
 Buku Teks
Language policy / Bernard Spolsky
Cambridge University Press, 2004
 eBooks