Gwartney,James D, & Stroup,Richard L. (1997). Economics: Private and public choice (8th ed.). Dryden Press.
Lua i Stíl Chicago (17ú heag.)Gwartney,James D, agus Stroup,Richard L. Economics: Private and Public Choice. 8th ed. Fort Worth: Dryden Press, 1997.
Lua MLA (9ú heag.)Gwartney,James D, agus Stroup,Richard L. Economics: Private and Public Choice. 8th ed. Dryden Press, 1997.
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