APA aipamena

Harbury, C. (1982). Workbook in Introductory Economics (Third Edition). ELSEVIER.

Chicago Style aipamena

Harbury, Colin. Workbook in Introductory Economics (Third Edition). ELSEVIER, 1982.

MLA aipamena

Harbury, Colin. Workbook in Introductory Economics (Third Edition). ELSEVIER, 1982.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.