Harbury, C. (1982). Workbook in Introductory Economics (Third Edition). ELSEVIER.
Chicago Style (17. basım) AtıfHarbury, Colin. Workbook in Introductory Economics (Third Edition). ELSEVIER, 1982.
MLA (8th ed.) AtıfHarbury, Colin. Workbook in Introductory Economics (Third Edition). ELSEVIER, 1982.
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