Allen, W. S. (1955). Living English Structure (3a. ed.). Longman.
Lua i Stíl Chicago (17ú heag.)Allen, W. Stannard. Living English Structure. 3a. ed. London: Longman, 1955.
Lua MLA (9ú heag.)Allen, W. Stannard. Living English Structure. 3a. ed. Longman, 1955.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.