Rae, John B.
Mc Graw-Hill Book Company, 1949
Buku Teks
Rae, John B.
McGraw-Hill, 1949
Buku Teks
Kemmerer, Donald L.
Littlefield, Adams, 1956
Buku Teks
Risjord, Norman K.
Prentice-Hall, 1985
Buku Teks
Zinn, Howard
HarperCollins Publishers, 2005
Buku Teks