Hubbard, R. G., & O'Brien, A. P. (2008). Microeconomics (2nd ed.). Pearson Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Hubbard, R. Glenn, agus Anthony Patrick O'Brien. Microeconomics. 2nd ed. Upper Saddle River, NJ: Pearson Prentice Hall, 2008.
Lua MLA (9ú heag.)Hubbard, R. Glenn, agus Anthony Patrick O'Brien. Microeconomics. 2nd ed. Pearson Prentice Hall, 2008.
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