Singh,Shashi <br/><br/>
'O' level: made simple Module III- Business systems / 
Singh,Shashi. 
 - 1st ed. 
 - New Delhi:  BPB publications,  1998. 
 - xxx,508p;25cm(v2) 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8170299837 
<br/><br/><label>Dewey Class. No.: </label>004 SIN