Shibatani, Masayoshi. 1999. The languages of Japan. (Cambridge Language Surveys.) Cambridge: Cambridge University Press. xv+411pp.
@book{shibatani1990japan,
address = {Cambridge},
author = {Shibatani, Masayoshi},
pages = {xv+411},
publisher = {Cambridge University Press},
series = {Cambridge Language Surveys},
title = {The languages of Japan},
year = {1999}
}