@book{Nakamura2009,
author = {Nakamura, J. and Naito, H. and Kanbayashi, R. and Kawaguchi, D. and Machikita, T.},
title= {Nihon no Gaikokujin Rodoryoku [Foreign workforce in Japan]},
year = {2009},
publisher = {Tokyo: Nikkei Publishing Inc.},
}