Etherton, A. R. B. (1994). General Certificate English. Nelson.
Lua i Stíl Chicago (17ú heag.)Etherton, A. R. B. General Certificate English. Walton-on-Thames: Nelson, 1994.
Lua MLA (8ú heag.)Etherton, A. R. B. General Certificate English. Nelson, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.