Hornby, A. S. (1964). Oxford progressive english alterntive course: Book a teacher's handbook. U.pr..
Lua i Stíl Chicago (17ú heag.)Hornby, A. S. Oxford Progressive English Alterntive Course: Book a Teacher's Handbook. London: U.pr., 1964.
Lua MLA (9ú heag.)Hornby, A. S. Oxford Progressive English Alterntive Course: Book a Teacher's Handbook. U.pr., 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.