Brezina, D. W. (1974). Congress in action: The environmental education act. The Free Press.
Chicago-čujuhus (17. p.)Brezina, Dennis W. Congress in Action: The Environmental Education Act. The Free Press, 1974.
MLA-čujuhus (9. p.)Brezina, Dennis W. Congress in Action: The Environmental Education Act. The Free Press, 1974.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.