Allen, W. (1959). Living English Structure (27th.). Orient Longman.
Lua i Stíl Chicago (17ú heag.)Allen, W. Living English Structure. 27th. Hyderabad: Orient Longman, 1959.
Lua MLA (9ú heag.)Allen, W. Living English Structure. 27th. Orient Longman, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.