Barlow, W. (1973). The Alexander Principle. Gollancz.
Lua i Stíl Chicago (17ú heag.)Barlow, Wilfred. The Alexander Principle. London: Gollancz, 1973.
Lua MLA (9ú heag.)Barlow, Wilfred. The Alexander Principle. Gollancz, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.