Liroff, R. A. (1976). A National policy for the environment: Nepa and its aftermath. Indiana U.Pr.
Chicago-čujuhus (17. p.)Liroff, Richard A. A National Policy for the Environment: Nepa and Its Aftermath. London: Indiana U.Pr, 1976.
MLA-čujuhus (9. p.)Liroff, Richard A. A National Policy for the Environment: Nepa and Its Aftermath. Indiana U.Pr, 1976.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.