Stanback, Thomas M.
Johns Hopkins University Press, 1979
Buku Teks
Stigler, George J., author
Princeton University Press, 1956
Buku Teks
Albrecht, Karl, 1941-, author
Dow Jones-Irwin , 1985
Buku Teks
Reese, Charles D., author
CRC Press, Taylor & Francis Group, 2009
Buku Referensi
Vance, Stanley C., author
Prentice-Hall, 1961
Buku Teks