Baumol, William J., author
Macmillan, 1959
Buku Klasik
Fouraker, Lawrence E., author
McGraw-Hill, 1963
Buku Teks
Weil, David N., author
Pearsons Addison-Wesley, 2009
Buku Teks
Eltis, W.A.
Hutchinson University Library , 1966
Buku Teks
JIIA-ISIS , 1996
Buku Teks