edited by Colin Campbell
American Enterprise Institute for Public Policy Research, 1977
Buku Teks
edited by Joseph A. Pechman
Brookings Institute, 1980
Buku Teks SO
National Bureau of Economic Research, 1949
Buku Teks SO
edited by James F. Albrecht and Dilip K. Das
CRC Press, Taylor & Francis Group, 2011
Buku Teks
Turner, Jonathan H.
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Buku Teks SO