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CASE, Karl E., FAIR, Ray C., OSTER, Sharon M.. (2014). Principles of economics (Ed. 11). England: PEARSON EDUCATION.

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CASE, Karl E., FAIR, Ray C., OSTER, Sharon M.. Principles of economics. Ed. 11 England: PEARSON EDUCATION, 2014. Text.

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CASE, Karl E., FAIR, Ray C., OSTER, Sharon M.. Principles of economics. Ed. 11 England: PEARSON EDUCATION, 2014. Text.

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CASE, Karl E., FAIR, Ray C., OSTER, Sharon M.. Principles of economics. Ed. 11 England: PEARSON EDUCATION, 2014. Print.