Godfrey, Martin, author
St. Martin's Press, 1985
Buku Teks
Burns, Arthur F., author
American Enterprise Institute, 1967
Buku Teks
OECD, 1995
Buku Teks
edited by Eithne McLaughlin
Routledge, 1992
Buku Teks
Carlberg, Michael, author
[Springer, Springer], 2012
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