SHEPARD, J. D. (1984). Power Supplies Jeffrey D. Shepard. Reston Publishing.
Lua i Stíl Chicago (17ú heag.)SHEPARD, Jeffrey D. Power Supplies Jeffrey D. Shepard. Reston Publishing, 1984.
Lua MLA (8ú heag.)SHEPARD, Jeffrey D. Power Supplies Jeffrey D. Shepard. Reston Publishing, 1984.
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