Cunningham, W. P., & Saigo , B. W. (1999). Environmental scince: A global concern (5th ed.). McGraw-Hill.
Chicago-čujuhus (17. p.)Cunningham, William P., juo Barbara Woodworth Saigo. Environmental Scince: A Global Concern. 5th ed. Boston: McGraw-Hill, 1999.
MLA-čujuhus (9. p.)Cunningham, William P., juo Barbara Woodworth Saigo. Environmental Scince: A Global Concern. 5th ed. McGraw-Hill, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.