Brulle, R. J. Environmentalism and human emancipation.
Chicago-čujuhus (17. p.)Brulle, Robert J. Environmentalism and Human Emancipation.
MLA-čujuhus (9. p.)Brulle, Robert J. Environmentalism and Human Emancipation.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.