Language teaching issues in multilingual environments in Southeast Asia
edited by Richard B. Noss
SEAMEO Regional Language Centre, 1982
 Buku Teks SO
Danuta Gabrys-Barker
Cross-linguistic influences in multilingual language acquisition
Springer, 2012
 eBooks
Cook, Guy W.D.
Language play, language learning
Oxford University Press, 2000
 Buku Teks
Language and language learning
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
 Buku Teks SO
Dakin, Julian
The language laboratory and language learning
Longman, 1975
 Buku Teks SO