Understanding American government / 
Susan Welch ... [et al.]. 
 - 11th ed. 
 - Belmont, CA :  Thomson/Wadsworth,  c2008. 
 - xxi, 762 p. :  ill. (some col.) ;  29 cm. 
<br/><br/>Includes bibliographical references (p. 689-728) and index. 
<br/><br/><label>ISBN: </label>0495098698 9780495098690 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Politics and government--Textbooks.