Verba, Sidney, Nie, Norman H., Kim, Jae-On..
Participation and political equality : a seven-nation comparison /

. - Chicago ; London  : The University of Chicago Press,  1978 
. - XXII, 394 p. : ill., tab.  23 cm. 
<br/>К.: Бібліогр. : с. 376-383. 
<br/><label>  ISBN: </label>0-226-85298-9