Brezina, D. W. (1974). Congress in action: The environmental education act. The Free Press.
Chicago-viite (17. p.)Brezina, Dennis W. Congress in Action: The Environmental Education Act. The Free Press, 1974.
MLA-viite (9. p.)Brezina, Dennis W. Congress in Action: The Environmental Education Act. The Free Press, 1974.
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