Vaccari, Oreste
Complete course of Japanese conversation grammar a new and practical method of learning the Japanese Language / Oreste Vaccari, Enko Elisa Vaccari
Charles E. Tuttle, 1952
 Buku Teks SO
McArthur, Thomas Burns
A foundation course for language teachers
Cambridge University Press, 1983
 Buku Teks SO
Cook, Guy W.D.
Language play, language learning
Oxford University Press, 2000
 Buku Teks
Language and language learning
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
 Buku Teks SO
Dakin, Julian
The language laboratory and language learning
Longman, 1975
 Buku Teks SO