Hill, M. K. (1997). Understanding environmental pollution. Univ. Pr.
Chicago-čujuhus (17. p.)Hill, Marquita K. Understanding Environmental Pollution. Cambridge: Univ. Pr, 1997.
MLA-čujuhus (9. p.)Hill, Marquita K. Understanding Environmental Pollution. Univ. Pr, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.