Mandl, Matthew, author
Reston Publishing Company, 1980
Buku Referensi
Gibson, J. R., author
Newnes , 2002
Buku Teks
Graf, Rudolf F., author
McGraw-Hill, 1985
Buku Referensi
Weyerer, Manfred
Prentice-Hall, 1992
Buku Teks
Chirlian, Paul M., author
McGraw-Hill, [1965]
Buku Teks