Gwartney, James D.
Economics Private and public choice
Dryden Press, 1995
 Buku Teks SO
Gwartney, James D.
Economics : private and public choice
Harcourt Brace Jovanovich, 1990
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Atkinson, Lloyd C.
Economics, the science of choice
Richard D. Irwin, 1982
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Gwartney, James D.
Economics private and public choice
The Reyden Press, 2000
 Buku Teks SO
Gwartney, James D.
Economics private and public choice
Harcourt Brace Jovanovich, 1987
 Buku Teks SO