Richards, Jack C.
Curriculum development in language teaching
Cambridge University Press, 2017
 Buku Teks SO
Cook, Vivian
Second language learning and language teaching
Edward Arnold, 2001
 Buku Teks SO
the Development of second language proficiency
Birgit Harley...[et al.], edited
Cambridge University Press , 1990
 Buku Teks SO
Hankes, Elmer Joseph
A universal second language
Hankes Foundation, 1992
 Buku Teks SO
Culture in second language teaching
 Artikel Jurnal