Citation Practice

"Average U.S. temperatures have already risen by 2°F over the past 50 years, and are projected  to rise another 7–11°F by the end of this century under a high-emissions scenario, and 4–6.5°F under a low-emissions scenario" (Ackerman, Stanton 1).

Paraphase:
The average temperature in the United States has risen 2 degrees in the past 50 years and is estimated to continue to rise by 7-11 degrees in the near future (Ackerman, Stanton 1)

Summary:
Within the past 50 years, the average temp. has risen 2 degrees. The United States Temperatures are rising and will continue to rise without action (Ackerman,Stanton 1).

Citation:
Ackerman, Frank. Stanton, Elizabeth. "Climate Change in the United States" The Prohibitive cost of   Inaction. Union of Concerned Scientists, n.d. 31 Oct. 2012