The handbook of bilingualism and multilingualism
edited by Tej K. Bhatia and William C. Ritchie
Wiley Blackwell, 2014
 Buku Teks SO
Baker, Colin
A parents' and teachers' guide to bilingualism
Multilingual Matters Ltd., 1995
 Buku Referensi
Banister, Peter
Qualitative methods in psychology : a research guide
Open University Press, 1994
 Buku Teks
Research methods in sociolinguistics : a practical guide
edited by Janet Holmes and Kirk Hazen
John Wiley & Sons, 2014
 Buku Teks
Qualitative methods in psychology : a research guide
bt Peter Banister ... [and others]
Open University Press, 2006
 Buku Teks