1. Ishida, Hiroshi. 2000. Gakkō Shokuan ga Kaizai-shita Job Matching no Hyōka (An appraisal of the job-matching system in which schools and PESOs intermediated). In Gakkō Shokuan to Rōdō Shijō (Schools, public employment offices, and the labor market in postwar Japan), ed. Takehiko Kariya, Shinji Sugayama, and Hiroshi Ishida. Tokyo: University of Tokyo Press.
2. Kase, Kazutoshi. 1997. “Shūdan Shūshoku” no Jidai (The age of “shūdan shūshoku”). Tokyo: Aoki Shoten.
3. King, Frederick A. 1924. Junior Workers. In Public Employment Offices, ed. M. Shelby Harrison et al. New York: Russel Sage Foundation.
4. Kōseishō, 1938, Shōgakkō Jidō Shūshoku ni kansuru Shiryō (Data on Junior Work placement).
5. Kōseishō Shokugyōbu, 1939, Shōwa 14nen Shōgakkō Sotsugyōsha no Shokugyō Shōkai Kankei Tsūchō (Collections of junior work placement guidelines issued in 1939).