Petruzella, Frank D. <br/><br/>
Programmable logic controllers / 
Frank D. Petruzella 
 - 4th ed. 
 - New York, NY :  McGraw-Hill Companies,  c2011 
 - xvii, 396 p. :  ill. (chiefly col.) ;  28 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780073510880 (pbk.) 0073510882 (pbk.) 9780071221351 (international student edition) 0071221352 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmable controllers