Diplomatic investigations : essays in the theory of internacional politics /
edited by Herbert Butterfield and Martin Wight 
. - London  : George Allen & Unwin Ltd.,  1969 
. - 227 p.  21 cm. 
 - ((Unwin University books) )
<br/>К.: Бібліогр. в підрядк. прим. 
<br/><label>  ISBN: </label>04-327006-9