Cunningham, W. P. (2005). Environmental science: A global concern. McGraw-Hill.
Chicago-čujuhus (17. p.)Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill, 2005.
MLA-čujuhus (9. p.)Cunningham, William P. Environmental Science: A Global Concern. McGraw-Hill, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.