PETRUZELLA. (1996). Industrial Electronics Petruzella. Glencoe.
Lua i Stíl Chicago (17ú heag.)PETRUZELLA. Industrial Electronics Petruzella. Glencoe, 1996.
Lua MLA (8ú heag.)PETRUZELLA. Industrial Electronics Petruzella. Glencoe, 1996.
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