Cita APA (7a ed.)

Harvey, J., & Johnson, M. K. (1994). Modern economics: Study guide and workbook (6th ed.). MacMillan.

Cita Chicago Style (17a ed.)

Harvey, J., y M. K. Johnson. Modern Economics: Study Guide and Workbook. 6th ed. London: MacMillan, 1994.

Cita MLA (9a ed.)

Harvey, J., y M. K. Johnson. Modern Economics: Study Guide and Workbook. 6th ed. MacMillan, 1994.