Ross, R. S., & study guide by Donald C.William. (1996). American national government: Institutions, policy and participation. McGraw-Hill.
Chicago Style (17. basım) AtıfRoss, Robert S., ve study guide by Donald C.William. American National Government: Institutions, Policy and Participation. New York: McGraw-Hill, 1996.
MLA (9th ed.) AtıfRoss, Robert S., ve study guide by Donald C.William. American National Government: Institutions, Policy and Participation. McGraw-Hill, 1996.
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