Axelson, Jan, author
Lakeview Research , 2000
Buku Teks
Sargent III, Murray, author
Addison-Wesley, 1981
Buku Teks
Derenzo, Stephen E., author
Prentice-Hall, 1990
Buku Teks
Dixey, Graham
Newnes, 1994
Buku Teks
Singh, Avtar, author
Prentice-Hall, 1989
Buku Teks