Checkland P <br/><br/>
Information systems & information systems: making sense of the field 
Checkland P; Holwell S 
 - New York  New York, John Wiley  1998 
 - xv,262 
<br/><br/><label>ISBN: </label>0-471-95820-4 
<br/><br/><label>Source: </label>Textbook