APA aipamena

Harvey, J., & Johnson, M. K. (1971). Modern economics: Study guide and workbook. Macmillan.

Chicago Style aipamena

Harvey, J., and M. K. Johnson. Modern Economics: Study Guide and Workbook. Macmillan, 1971.

MLA aipamena

Harvey, J., and M. K. Johnson. Modern Economics: Study Guide and Workbook. Macmillan, 1971.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.