Brook, P. (1989). The shifting point: Forty years of theatrical exploration : 1946-1987. Methuen Drama.
Lua i Stíl Chicago (17ú heag.)Brook, Peter. The Shifting Point: Forty Years of Theatrical Exploration : 1946-1987. London <etc.>: Methuen Drama, 1989.
Lua MLA (9ú heag.)Brook, Peter. The Shifting Point: Forty Years of Theatrical Exploration : 1946-1987. Methuen Drama, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.