Clark, J. (1985). Study Guide to Accompany Gwartney, Stroup, and Clark's Essentials of Economics (Second Edition). ELSEVIER.
Cita Chicago (17th ed.)Clark, J.R. Study Guide to Accompany Gwartney, Stroup, and Clark's Essentials of Economics (Second Edition). ELSEVIER, 1985.
Cita MLA (8th ed.)Clark, J.R. Study Guide to Accompany Gwartney, Stroup, and Clark's Essentials of Economics (Second Edition). ELSEVIER, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.