Purtill, Richard L..
Philosophical questions: an introductory anthology /
Richard L. Purtill, Michael H. MacDonald, Peter J. Kreeft 
. - Englewood Cliffs : Prentice-Hall, Inc.,  1985 
. - xi, 388 p.  22 cm. 
<br/><label>  ISBN: </label>0-13-662305-0