Dante Alighieri..
On World-Government (De Monarchia) /
Translated by Herbert W. Schneider; With an Introduction by Dino Bigongiari 
. - New York; London : Macmillan Publishing Company; Collier Macmillan Publish,  1989 
. - xvi, 80 p.  20 cm. 
<br/><label>  ISBN: </label>0-02-408260-0