Electrical Research Association Ltd
Pergamon Press, 1979
Buku Referensi
Klingman, Edwin E.
Prentice-Hall, 1977
Buku Teks
Hogenboom, P., author
Elektuur B.V., 1988
Buku Teks
Klingman, Edwin E.
Prentice-Hall, 1982
Buku Teks
Halsall, Fred, author
Pitman, 1982
Buku Teks