APA-čujuhus (7. p.)
ebrary, Inc, & Helfand, G. E. (2001). Environmental policy analysis for decision making. Kluwer Academic Publishers.
Chicago-čujuhus (17. p.)
ebrary, Inc, juo Gloria E. Helfand. Environmental Policy Analysis for Decision Making. Dordrecht ; Boston: Kluwer Academic Publishers, 2001.
MLA-čujuhus (9. p.)
ebrary, Inc, juo Gloria E. Helfand. Environmental Policy Analysis for Decision Making. Kluwer Academic Publishers, 2001.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.