Electrical  installation calculation :  for technical certificate level 2 / 
Kitcher, Christopher .; Watkins, A.J 
 - 9th ed. 
 - New York :  Routledge,  2014. 
 - viii, 209 p.: 18.6 cm. 
<br/><br/>Includes additional Questions and answers 
<br/><br/><label>ISBN: </label>9780415810043 
<br/><br/><label>Dewey Class. No.: </label>C 621.319 K62 2014