Wolff, John U., author
Deprtment of Asian Studies, 1982
Buku Teks
Trudgill, Peter, author
Penguin, 1995
Buku Teks
Taglianonte, Sali A., author
Wiley-Blackwell, 2012
Buku Teks
Cambridge University Press, 2009
eBooks
Hymes, Dell H., author
Taylor and Francis Inc., 1996
Buku Teks