Παραπομπή APA

Harvey, J., & Johnson, M. K. (1974). Modern economics: Study guide and workbook (2nd ed.). Macmillan.

Παραπομπή Chicago Style

Harvey, J., και M. K. Johnson. Modern Economics: Study Guide and Workbook. 2nd ed. Macmillan, 1974.

Παραπομπή MLA

Harvey, J., και M. K. Johnson. Modern Economics: Study Guide and Workbook. 2nd ed. Macmillan, 1974.