Jamieson, Archibald, author
Reston Publishing, 1982
Buku Teks
Montgomery, Douglas C., author
John Wiley & Sons, 2001
Buku Teks
Besterfield, Dale H., author
Prentice-Hall, 1998
Buku Teks
Besterfield, Dale H., author
Prentice-Hall, 1994
Buku Teks
Besterfield, Dale H., author
Prentice-Hall, 1979
Buku Teks