Michels, Robert 1876-1936.
Political parties: a sociological study of the oligarchical tendencies of modern democracy /
Robert Michels ; translated by Eden and Cedar Paul ; introduction by Seymour Martin Lipset 
. - New York : Free Press,  1962 
. - 379 p.  20 cm. 
<br/>К.: Бібліогр. в підрядк. прим., Index 
<br/><label>  ISBN: </label>0-02-921250-2