Buzan, Barry <br/><br/>
International systems in world history :  remaking the study of international relations / 
Barry Buzan 
 - Oxford  :  Oxford university press,  2000       
 - viii, 452 p. 
<br/><br/><label>ISBN: </label>0198780656 
<br/><br/><label>LC Class. No.: </label>JZ 1249 B992i 2000