Swartz, W. G. (1957). American governmental problems. Van Nostrand.
Chicagoスタイル(17版)引用形式Swartz, Willis G. American Governmental Problems. Princeton, N.J: Van Nostrand, 1957.
MLA(9版)引用形式Swartz, Willis G. American Governmental Problems. Van Nostrand, 1957.
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