Shull, S. A. (1979). Presidential policy making: An analysis. King's Court Communications Inc.
Chicagoスタイル(17版)引用形式Shull, Steven A. Presidential Policy Making: An Analysis. Brunswick, Ohio: King's Court Communications Inc, 1979.
MLA(9版)引用形式Shull, Steven A. Presidential Policy Making: An Analysis. King's Court Communications Inc, 1979.
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