Mather, A. (1995). : Environmental resources. Longman.
Chicago-čujuhus (17. p.)Mather, A.S. : Environmental Resources. London: Longman, 1995.
MLA-čujuhus (9. p.)Mather, A.S. : Environmental Resources. Longman, 1995.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.