Gwartney, James D.
Economics Private and public choice
Dryden Press, 1995
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Gwartney, James D.
Economics : private and public choice
Harcourt Brace Jovanovich, 1990
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Becker, William E.
A complement to choice an introduction to economics
Prentice-Hall, 1971
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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