Sirmans, C. F., author
McGraw-Hill , 1985
Buku Teks
Nelson, Grant S., author
West Publishing, 1992
Buku Teks
Maisel, Sherman J.
McGraw-Hill, 1976
Buku Teks
Cummings, Jack
Prentice-Hall, 1997
Buku Teks
Shilling, James D., author
South-Western, 2002
Buku Teks