Arnold, R. A. (2001). Economics (6th ed.). South-Western College Pub..
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Chicago-čujuhus (17. p.)
Arnold, Roger A. Economics. 6th ed. Cincinnati, Ohio: South-Western College Pub., 2001.
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MLA-čujuhus (9. p.)
Arnold, Roger A. Economics. 6th ed. South-Western College Pub., 2001.
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