(1990). Collins Cobuild English grammar. Collins.
Lua i Stíl Chicago (17ú heag.)Collins Cobuild English Grammar. London: Collins, 1990.
Lua MLA (9ú heag.)Collins Cobuild English Grammar. Collins, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.