Shibatani, Masayoshi. 1990. The Languages of Japan. (Cambridge Language Surveys.) Cambridge: Cambridge University Press.
@book{shibatani1990,
address = {Cambridge},
author = {Shibatani, Masayoshi},
publisher = {Cambridge University Press},
series = {Cambridge Language Surveys},
title = {The Languages of Japan},
year = {1990}
}