Mitra, Sanjit K.
McGraw-Hill, 2011
Buku Teks
Ingle,Vinay K
Cengage Learning , 2012
Buku Teks
Ifeachor, Emmanuel C.
Prentice-Hall, 2002
Buku Teks
Burrus, C. Sidney
Paramount Communication Company, 1994
Buku Teks
Stanley, William D.
Reston Publishing, 1984
Buku Teks