Herbert, Simon J. A. <br/><br/>
Powerbuilder 4 Unleashed 

 - New York;  SAMs Publishing,  1995 
 - xxvii, 1102  (R 12 SH  4) 
<br/><br/><label>ISBN: </label>0672308339 
<br/><br/><label>Source: </label> Aman Ullah Khan 
<br/><br/><label>Dewey Class. No.: </label>005.276