Patrick, Dale R., author
Prenticel Hall Carreer & Technology, 1990
Buku Teks
Matt, Stephen R., author
Goodheart-Willcox, 1994
Buku Teks
Miller, Gary M., author
Prentice-Hall, 1981
Buku Teks
Boylestad, Robert L., author
Prentice-Hall, 1983
Buku Teks
Zbar, Paul B., author
MrGraw-Hill, 1977
Buku Teks