Hubbard, G. P., & O'Brien, A. P. (2017). Economics (Sixth edition, Global edition.). Pearson.
Cita Chicago Style (17a ed.)Hubbard, Glenn P., y A. P. O'Brien. Economics. Sixth edition, Global edition. Boston, [Massachusetts]: Pearson, 2017.
Cita MLA (8a ed.)Hubbard, Glenn P., y A. P. O'Brien. Economics. Sixth edition, Global edition. Pearson, 2017.
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