Directory of American philosophers 1988-1989  [Texte imprimé] / 
ed. Archie J. Bahm 
 - 4e éd. 
 - Bowling Green:  Philosophy Documentation Center,  cop. 1988 
<br/><br/><label>ISBN: </label>0-912632-85-2 
<br/><br/><label>Dewey Class. No.: </label>192.092