Barker, Joel Arthur.
Paradigms: the business of discovering the future /
Joel Arthur Barker 
. - New York : HarperBusiness,  1993 
. - 240 p.  schem.  20 cm. 
<br/>К.: Бібліогр. : c. 219-228, Index 
<br/><label>  ISBN: </label>0-88730-647-0