Langen, Eugen.
A. W. Sijthoff , 1973
Buku Teks
by Thomas W. Dunfee [and others]
McGraw-Hill, 1996
Buku Teks
American Institute of Banking, 1962
Buku Teks
Anderson, Ronald A., author
South-Western Publishing Co, 1961
Buku Teks
Rogers, Margaret
Oceana Publications Inc., 1969
Buku Teks