Artikel Jurnal
Bertin, Eric, author
Springer, 2012
eBooks
edited by the Electricity Training Association
The Institution of Electrical Engineers, 1995
Buku Teks
Landau, Lev D., author
Pergamon Press, 1980
Buku Teks
Lifshitz, E.M., author
Pergamon Press, 1980
Buku Teks