London : Duculot, 1984,
Buku Referensi
Li, Jerome C.R.
Edwards Brothers, 1964
Buku Teks
Bryant, Edward C.
McGraw-Hill Book , 1966
Buku Teks
Bennett, Jeffrey O.
Pearson - Addison Wesley, 2009
Multimedia
Bhattacharyya, Gouri K.
John Wiley & Sons, 1977
Buku Teks