De France, J. J. (1969). Electrical fundamentals. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)De France, Joseph J. Electrical Fundamentals. Englewood Cliffs, N.J.: Prentice-Hall, 1969.
Lua MLA (8ú heag.)De France, Joseph J. Electrical Fundamentals. Prentice-Hall, 1969.
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