Kemp, R. (1980). Pollution: Pupil`s book. Edward Arnold.
Chicago-čujuhus (17. p.)Kemp, Richard. Pollution: Pupil`s Book. London: Edward Arnold, 1980.
MLA-čujuhus (9. p.)Kemp, Richard. Pollution: Pupil`s Book. Edward Arnold, 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.