Covington, J.S., author
John Marshall, 1990
Buku Teks
Morrissey, Leonard E., author
Prentice-Hall, 1963
Buku Teks
Nickerson, Clarence B., author
McGraw-Hill, 1962
Buku Teks
Lipschutz, Seymour, 1915-2003, author
McGraw-Hill, 1997
Buku Teks
Sutherland, Arthur E.
The Foundation Press, Inc., 1953
Buku Teks