Cohen, Norman H., author
ADA as a second language
McGraw-Hill, 1986
 Buku Teks
Johnson, Philip I., author
The ada primer: an introduciton to the ada language system
McGraw-Hill, 1985
 Buku Teks
Cook, Vivian, author
Second language learning and language teaching
ARNOLD, 2001
 Buku Teks
A Universal second language
The Hankes Foundation, 1992
 Multimedia
Saville-Troike, Muriel, 1936-, author
Introducing second language acquisition
Cambridge University Press , 2006
 Buku Teks
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