Cook, Vivian
Second language learning and language teaching
ARNOLD, 2001
 Buku Teks
Richards, Jack C.
Approaches and methods in language teaching
Cambridge University Press, 2015
 Buku Teks
Ellis, Rob
Instructed second language acquisition
Blackwell, 1990
 Buku Teks
Leaver, Betty Lou
Achieving success in second language acquisition
Cambridge Press , 2005
 Buku Teks SO
Second language development: trends and issues / edited, Sascha W. Felix
edited by Sascha W. Felix
Gunter Narr Verlag, 1980
 Buku Teks SO