Hyman, R. (1971). The Workers' Union. Clarendon Press.
Lua i Stíl Chicago (17ú heag.)Hyman, Richard. The Workers' Union. Oxford,: Clarendon Press, 1971.
Lua MLA (8ú heag.)Hyman, Richard. The Workers' Union. Clarendon Press, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.