Here is the first sentence, which wants Ref 1 to be attached. [1]. Here is now the second sentence which wants the Congressional Quarterly to be cited [2]
^American Environmentalism; The U.S. Environmental Movement, 1970-1990. New York: Taylor and Francis. 1992. p. 14. {{cite book}}: Unknown parameter |authors= ignored (help)
^Bill Keller (Jan 31, 1981). "Congressional Quarterly". p. 212.
