Kemp, R. (1980). Pollution: Pupil`s book. Edward Arnold.
Lua i Stíl Chicago (17ú heag.)Kemp, Richard. Pollution: Pupil`s Book. London: Edward Arnold, 1980.
Lua MLA (9ú heag.)Kemp, Richard. Pollution: Pupil`s Book. Edward Arnold, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.