Medieval political philosophy: a sourcebook /
edited by Ralph Lerner and Muhsin Mahdi, with the collaboration of Ernest L. Fortin 
. - Ithaca : Cornell university press,  1972 
. - xii, 532 p.  22 cm. 
 - (Agora paperback editions )(Cornell paperbacks  ; 139 )
<br/>К.: Бібліогр. : c. 527-528, Index