PETRUZELLA, F. D. (2017). Programmable logic controllers. McGraw Hill Education.
Lua i Stíl Chicago (17ú heag.)PETRUZELLA, Frank D. Programmable Logic Controllers. McGraw Hill Education, 2017.
Lua MLA (9ú heag.)PETRUZELLA, Frank D. Programmable Logic Controllers. McGraw Hill Education, 2017.
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