Saville-Troike, Muriel, 1936-
Introducing second language acquisition
Cambridge University Press, 2006
 Buku Teks SO
Mitchell, Rosamond
Second language learning theories
Arnold, 1998
 Buku Teks SO
Saville-Troike, Muriel, 1936-
Introducing second language acquisition
Cambridge University Press, 2012
 Buku Teks SO
Language contact / Yaron Matras
Cambridge University Press, 2009
 eBooks
Larsen-Freeman, Diane
An introduction to second language acquisition research
Longman , 1992
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