Luoma, S. N. (1984). Introduction to environmental issues. MacMillan.
Chicago-čujuhus (17. p.)Luoma, Samuel N. Introduction to Environmental Issues. London: MacMillan, 1984.
MLA-čujuhus (9. p.)Luoma, Samuel N. Introduction to Environmental Issues. MacMillan, 1984.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.