Chambers, Raymond J.
Sweet & Maxwell, 1953
Buku Teks
Brigham, Eugene F., 1930-
The Dryden Press, 1994
Buku Teks
Brigham, Eugene F., 1930-
The Dryden Press, 1991
Buku Teks
Emery, Douglas R.
Prentice-Hall, 1997
Buku Teks
Schall, Lawrence D.
McGraw-Hill, 1986
Buku Teks