Johnson, Philip I.
The ada primer: an introduciton to the ada language system
McGraw-Hill, 1985
 Buku Teks
Cook, Vivian
Second language learning and language teaching
ARNOLD, 2001
 Buku Teks
A Universal second language
The Hankes Foundation, 1992
 Multimedia
Saville-Troike, Muriel, 1936-
Introducing second language acquisition
Cambridge University Press , 2006
 Buku Teks
Second language needs analysis
edited by Michael H. Long
Cambridge University Press, 2005
 Buku Teks