Samuel, R., MacColl, E., & Samuel, R. (1985). Theatres of the left: 1880 - 1935 : workers' theatre movements in Britain and America. Routledge & Kegan Paul.
Lua i Stíl Chicago (17ú heag.)Samuel, Raphael, Ewan MacColl, agus Raphael Samuel. Theatres of the Left: 1880 - 1935 : Workers' Theatre Movements in Britain and America. London [u.a.]: Routledge & Kegan Paul, 1985.
Lua MLA (8ú heag.)Samuel, Raphael, et al. Theatres of the Left: 1880 - 1935 : Workers' Theatre Movements in Britain and America. Routledge & Kegan Paul, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.