Cita APA (7a ed.)

Clark, J. R., & Gwartney, J. D. (1985). Study guide to accompany Gwartney, Stroup, and Clark's Essentials of economics, second edition. Academic Press, Inc. (Harcourt Brace Jovanovich, Publishers).

Cita Chicago Style (17a ed.)

Clark, J. R., y James D. Gwartney. Study Guide to Accompany Gwartney, Stroup, and Clark's Essentials of Economics, Second Edition. Orlando: Academic Press, Inc. (Harcourt Brace Jovanovich, Publishers), 1985.

Cita MLA (8a ed.)

Clark, J. R., y James D. Gwartney. Study Guide to Accompany Gwartney, Stroup, and Clark's Essentials of Economics, Second Edition. Academic Press, Inc. (Harcourt Brace Jovanovich, Publishers), 1985.