Packard, V. O. (1989). The ultra rich: How much is too much? Little, Brown.
Chicagoスタイル(17版)引用形式Packard, Vance Oakley. The Ultra Rich: How Much Is Too Much? Boston: Little, Brown, 1989.
MLA(9版)引用形式Packard, Vance Oakley. The Ultra Rich: How Much Is Too Much? Little, Brown, 1989.
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