Shaffer, Rick, author
Gramercy Books, 1994
Buku Referensi
Chaisson, Eric, author
Prentice-Hall, 1999
Multimedia
Jefferys, William H., author
John Wiley & Sons, 1981
Buku Teks
Hoyle, Fred, author
Harper & Brothers, 1955
Buku Teks
Hartman, William K., author
Wadswoth, 1978
Buku Teks