Thomson, A. (1966). A practical english grammar exercises-4 Vol 4. O.U.P.
Lua i Stíl Chicago (17ú heag.)Thomson, A. A Practical English Grammar Exercises-4 Vol 4. London: O.U.P, 1966.
Lua MLA (9ú heag.)Thomson, A. A Practical English Grammar Exercises-4 Vol 4. O.U.P, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.