Hubbard. (2019). Essentials Of Economics (6th ed.). Pearson.
Chicagoスタイル(17版)引用形式Hubbard. Essentials Of Economics. 6th ed. Newyork: Pearson, 2019.
MLA(9版)引用形式Hubbard. Essentials Of Economics. 6th ed. Pearson, 2019.
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APA(7版)引用形式