Douglas-Young, John, author
Parker Publishing Company, 1978
Buku Referensi
Millman, Jacob, author
McGraw-Hill, 1987
Buku Teks
Infotech, 1980
Buku Teks
Roddy, Dennis, author
Pergamon Press, 1978
Buku Teks
Colclaser, Roy A., author
John Wiley & Sons, 1980
Buku Teks