Drain, R. (1995). Twentieth-century theatre: A sourcebook. Routledge.
Lua i Stíl Chicago (17ú heag.)Drain, Richard. Twentieth-century Theatre: A Sourcebook. London ; New York: Routledge, 1995.
Lua MLA (9ú heag.)Drain, Richard. Twentieth-century Theatre: A Sourcebook. Routledge, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.