Hubbard. (2019). Essentials Of Economics (6th ed.). Pearson.
Tohutoru Kātū Chicago (17th ed.)Hubbard. Essentials Of Economics. 6th ed. Newyork: Pearson, 2019.
Tohutoro MLA (9th ed.)Hubbard. Essentials Of Economics. 6th ed. Pearson, 2019.
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