^Hoover, William D. (2018). Historical Dictionary of Postwar Japan. Rowman and Littlefield. ISBN9781538111567.
^Chaffee, Frederick H. (1969). Area Handbook for Japan. Washington DC: U.S. Government Printing Office.
^Foreign Labor Trends: Japan. Washington DC: United States Department of Labor. 1988.
^Japan Labour Bulletin. 38 (5). 1999. {{cite journal}}: Missing or empty |title= (help)
^"Japan". Report of the Secretariat to the IMF Central Committee. 1990.
^Seifert, Wolfgang (13 March 2013). Gewerkschaften in der japanischen Politik von 1970 bis 1990. VS Verlag für Sozialwissenschaften. ISBN9783322899309.