Gwartney, J. D., Stroup, R., & Studenmund, A. H. (1992). Economics, private and public choice / James D. Gwartney...(et. al.) (6th ed.). The Dryden Press.
Lua i Stíl Chicago (17ú heag.)Gwartney, James D., Richard Stroup, agus A. H. Studenmund. Economics, Private and Public Choice / James D. Gwartney...(et. Al.). 6th ed. Fort Worth: The Dryden Press, 1992.
Lua MLA (9ú heag.)Gwartney, James D., et al. Economics, Private and Public Choice / James D. Gwartney...(et. Al.). 6th ed. The Dryden Press, 1992.
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