Cooper, Robert L.
Language planning and social change
Cambridge University Press, 1989
 Buku Teks
Frontier of foreign language education
Osaka University
Osaka University, 2020
 Buku Teks SO
Periodicals for language education and research
SEAMEO Regional Language Centre, 1983
 Buku Referensi
Frontier of Foreign Language Education
Graduate School of Language and Culture, Osaka University, 2018
 Majalah, Jurnal, Buletin
Christie, Francis
Language education / Francis Christie
Oxford University Press, 1989
 Buku Teks SO