Gaya APA

PETRUZELLA, F, D. (2011). PROGRAMMABLE LOGIC CONTROLLERS (ED.4). NEW YORK: Mc Graw-Hil Book Company.

Gaya MLA

PETRUZELLA, FRANK, D.. "PROGRAMMABLE LOGIC CONTROLLERS". ED.4 NEW YORK: Mc Graw-Hil Book Company, 2011. Text.