Wagner, R. H. (1978). Man and the environment. (3rd ed.). W W Norton.
Chicago-čujuhus (17. p.)Wagner, Richard H. Man and the Environment. 3rd ed. New York: W W Norton, 1978.
MLA-čujuhus (9. p.)Wagner, Richard H. Man and the Environment. 3rd ed. W W Norton, 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.