LAND, G. (1992). Business reading. Longman.
Lua i Stíl Chicago (17ú heag.)LAND, Geoffrey. Business Reading. England: Longman, 1992.
Lua MLA (9ú heag.)LAND, Geoffrey. Business Reading. Longman, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.