Hiroshi, Mitani
Escape from impasse : the decision to open Japan
International House of Japan, 2006
 Buku Teks SO
Trudgill, Peter
Dialect Matters: respecting vernacular language: columns from the Eastern Daily Press
Cambrigde University Press , 2016
 Buku Teks SO
Advances in spoken discourse analysis
edited by Malcolm Coulthard
Routledge, 1992
 Buku Teks
Chao, Yuen Ren, 1892-
Concise dictionary of spoken Chinese
Harvard University Press, 1962
 Buku Referensi
Ballantine, Joseph W.
Japanese as it is spoken : a beginners grammar
Stanford University, 1945
 Buku Teks SO