Cita APA (7a ed.)

Gwartney, J. D., Stroup, R., & Clark, J. R. (1985). Essentials of economics (Second edition.). Academic Press.

Cita Chicago Style (17a ed.)

Gwartney, James D., Richard Stroup, y J. R. Clark. Essentials of Economics. Second edition. Orlando: Academic Press, 1985.

Cita MLA (8a ed.)

Gwartney, James D., et al. Essentials of Economics. Second edition. Academic Press, 1985.