The The University of Chicago
The University of Chicago Press, 1972
Buku Teks SO
The University of Chicago Press, 1977
Buku Teks
De Gregori, Thomas R
Wiley, 1969
Buku Teks
Galbraith, John Kenneth, 1908-2006
Harvard University Press, 1964
Buku Teks SO
Herrick, Bruce H.
McGraw-Hill, 1983
Buku Teks